Size signs to the viewing distance and content: letter height ~ distance(m) x 3–5 mm with large symbols. When unsure, go up a size.
When a safety message is hard to read, it might as well not exist. The right sign size makes your headline legible at the required distance, gives pictograms enough presence to be recognised quickly and fits the mounting space without compromise. This guide explains how to choose a format that works on site, not just on screen.
Quick recommendations
If you need a fast decision, use A-series formats for most workplaces: A4 for close-up labels on equipment, A3 for doors and small rooms, A2 for corridors and small warehouses, and A1–A0 where people must read from further away or in busy environments. If the space is unusual or the message is long, a custom dimension can keep text legible without cramming.
- A4 is best for operator-facing instructions and machine labels within arm's length.
- A3 suits doors, noticeboards and small rooms where viewing is within a few metres.
- A2 works for corridors and racking aisles where people read while walking.
- A1–A0 provide stand-off readability in large spaces, loading bays and outdoors.
- Go custom when the mounting area is constrained, the message is lengthy or an icon needs extra prominence.
For safety signs used in workplaces, size, layout and colours should align to AS 1319 guidance so your message is understood consistently across Australian sites. See the AS 1319 section below for a quick compliance refresher before you finalise artwork. As a rule of thumb, aim for 3–4 mm of main-text x-height per metre of viewing distance, and prioritise clear pictograms over long sentences.
How to decide step-by-step
Picking the right size is easier when you follow a simple process focused on legibility and the actual mounting location.
- Measure the typical viewing distance. Check the furthest point where people must still understand the message. Avoid guessing—physically pace it out.
- Count the content. Note how many words, the longest line, whether pictograms are required and if multiple languages are needed.
- Check the mounting space. Measure the available width/height, obstructions, and sightlines. Confirm portrait or landscape works best.
- Choose material for the environment. Rigid panels (e.g. aluminium composite) suit long-term and windy sites; corflute for temporary; self-adhesive vinyl for equipment labels.
- Consider visibility upgrades. Reflective films, anti-graffiti laminate and high-contrast colourways can improve recognition in low light or harsh conditions.
- Confirm fixings. Decide on screw holes, posts, adhesives or cable ties. Fixing method can influence margins and panel thickness.
Sign Portal preflights each order against your site notes: we verify the viewing distance you provide, cross-check hole centres against your drawing, and simulate text x‑height and pictogram size on a scaled proof so you can validate readability before we print.
Standard formats and custom dimensions
Standard A-series sizes are fast to order, efficient to nest on sheets and familiar to staff. Custom dimensions shine when you must fill a specific space, align with architectural elements or scale icons larger without wasting space. As an in-house manufacturer, we can direct UV print to rigid panels, then route to exact size or shape—so neither option limits print quality.
For planning and value, it helps to know common sheet sizes we stock: ACP at 2440 × 1220 mm and 3050 × 1500 mm; corflute at 2440 × 1220 mm; foam PVC at 2440 × 1220 mm. We optimise nesting to minimise offcuts, so custom sizes that tile well (e.g. 600 × 900 mm, 450 × 600 mm) can be as cost‑effective as A‑series.
| Feature | Option A | Option B |
|---|---|---|
| Definition | Standard A-series formats (e.g. A4, A3, A2, A1, A0) | Custom dimensions to fit space or content |
| Speed to order | Typically quicker—common presets | Similar turnaround in-house; confirm at quote |
| Material yield | Often higher yield per sheet | Excellent when sized to optimise sheet nesting |
| Mounting fit | Good for most doors/walls | Best when space is constrained or architectural |
| Design flexibility | Familiar layouts; fixed ratios | Full control of aspect ratio and margins |
| Cost effectiveness | Strong for small volumes | Strong at scale when optimised nesting reduces waste |
| Wayfinding consistency | Easy to keep uniform across a site | Can align with architectural grids and sightlines |
Orientation and layout
Use portrait when headlines stack better vertically or space is taller than it is wide. Use landscape when pictograms or long instruction lines flow horizontally. Maintain a clear hierarchy: hazard header, pictogram, key action and any secondary text. Avoid squeezing extra lines—if content feels tight, step up one size or go custom.
- Keep generous margins so fixings and gloved hands don’t obscure content.
- Ensure pictograms are large enough to be recognised instantly at the viewing distance.
- Use consistent proportions across a site to reduce cognitive load.
AS 1319 quick review (Safety signs for the occupational environment)
AS 1319 sets out the design and use of safety signs in Australian workplaces. It covers classification, colour coding, layout conventions and message intent so signs are interpreted consistently.
- Categories commonly used: Regulatory (Mandatory, Prohibition, and Danger signs), Hazard warnings, and Emergency information and Fire signs.
- Key elements: correct signal headers, prescribed colours/contrasts, clear pictograms, concise wording tailored to the hazard or action.
- Application: select the category that matches the risk and control measure, place signs where the message can be seen before exposure to the hazard, and keep messages unambiguous.
- Sizing: choose a size that maintains legibility at the required viewing distance. When in doubt, step up a size—legibility and comprehension are paramount.
Design cues the standard expects practitioners to follow:
- Danger: use only for life‑threatening hazards. Header with the DANGER signal within a black panel; do not dilute with non‑critical messages.
- Prohibition: red annulus with diagonal bar over a black pictogram on white; supporting text, if used, stays brief and direct.
- Mandatory: white pictogram within a solid blue circle; text expresses the required action (e.g. Wear eye protection).
- Warning (hazard): black pictogram within a yellow triangle with black border; used for hazards that can cause harm if unheeded.
- Emergency and Fire: white symbols/text on green (emergency) and red (fire) rectangular fields respectively for equipment and exits/first‑aid locations.
- Don’t mix categories on a single panel where it confuses intent; separate messages improve comprehension.
- Placement: position so the message is readable before a person commits to the hazard path of travel; maintain an unobstructed sightline.
Sign Portal’s production templates are engineered to align with AS 1319 conventions, including header colours, typography hierarchies and pictogram placement. If you provide custom artwork, we can preflight it for AS 1319 alignment during proofing and advise if changes are needed. We match safety colours within tight tolerances using ICC‑profiled workflows so red/blue/green fields remain distinct under varied lighting.
Sign size and viewing distance estimator
Use this practical method to translate viewing distance into a sign size that works on the floor.
- Step 1 — Measure the maximum viewing distance in metres.
- Step 2 — Calculate minimum x-height (lowercase letter height) for main text: distance (m) ÷ 0.3 = height in mm for stationary readers; multiply by 1.4 if people are moving or the background is busy.
- Step 3 — Ensure the pictogram height is at least 4× the text x-height for rapid recognition.
- Step 4 — Choose the smallest A-size or custom dimension that comfortably fits your header, pictogram and text at these sizes with safe margins.
Quick lookup (typical indoor lighting): 1–2 m → A4; 2–5 m → A3; 5–10 m → A2; 10–15 m → A1; 15–25 m → A0. In low light or high-glare areas, size up or use reflective film.
Example: An 8 m aisle with moving forklifts — base x-height 8 ÷ 0.3 ≈ 27 mm, then ×1.4 ≈ 38 mm. That typically requires A2 or A1 depending on word count and pictogram size.
Decision tool multipliers to refine your estimate:
- Motion factor (M): 1.0 for stationary readers; 1.2–1.5 for pedestrians; 1.6–2.0 where vehicles are present.
- Lighting factor (L): 1.0 for bright, uniform light; 1.2 for variable/low light; + reflective film (RA1/RA2) for night‑time or tunnels.
- Obstruction factor (O): 1.0 for clear views; 1.2 where rails, racks or glazing may partially obscure the sign.
Working formula: required x‑height (mm) ≈ distance (m) ÷ 0.3 × M × L × O. We include this calculation on our proof, so you can sign off with confidence.
| Viewing distance (m) | Typical main-text x-height (mm) | Likely panel size (guide) |
|---|---|---|
| 1–2 | 4–8 | A4 / A5 label |
| 2–5 | 8–17 | A3 |
| 5–10 | 17–35 | A2 |
| 10–15 | 35–50 | A1 |
| 15–25 | 50–85 | A0 / custom |
Material choice sets practical limits
Different substrates behave differently at size. Aluminium composite panel (ACP) offers excellent rigidity for long-term indoor/outdoor signs. Corflute is light and economical for temporary worksites. Foam PVC suits indoor areas with low impact risk. Self-adhesive vinyl works for equipment labels and curved surfaces. In coastal, hot or high-UV environments, choose durable films and consider a protective laminate.
Typical options we keep on hand: ACP 3 mm (general use) and 4 mm (larger spans), corflute 5 mm (economical) and 8 mm (windier sites), foam PVC 3–5 mm for indoor walls. FR‑grade ACP and low‑VOC films are available on request for projects with stricter building or environmental requirements.
At Sign Portal, rigid panels can be direct UV printed on our flatbeds, then CNC routed to exact size or shape. Plastics can be laser cut for clean edges on smaller formats, and wide-format self-adhesive vinyl can be printed and contour cut for labels and curved surfaces. These processes mean you are not locked into a template if your message needs more space.
- Temporary construction hazards: corflute A2 or custom 600 mm square, cable-tied to fencing.
- Machine guards: self-adhesive vinyl label sized to fit the flat surface near the operator controls.
- Outdoor mandatory PPE boards: ACP in A1 or custom 900 × 600 mm to align with posts.
Installation and fixing considerations
Fixings influence both size and margins. Screws and stand-offs require edge clearance; posts may need hole patterns that suit the post centres; adhesives call for a clean, compatible substrate. In windy locations, larger panels should be mounted to sufficiently rigid structures, and extra fixings can reduce panel flex.
- Walls/doors: Screws with wall plugs, stand-offs, or high-bond tapes (surface dependent).
- Fencing/temporary barriers: Cable ties through punched holes or eyelets.
- Posts/frames: Bolts through pre-drilled holes with washers; confirm hole spacing during artwork.
- Equipment: Self-adhesive labels (clean, degreased surface; test adhesion).
Near the coast, specify stainless 316 fixings. For panels over ~900 mm on the long edge, increase fixing count and consider 4 mm ACP or a frame to limit flutter. We supply DXF/AI drilling templates on request so your installers can pilot-hole accurately.
Harsh environments and visibility upgrades
Australian conditions can be tough on signage. High UV, coastal salt, red dust and heat all accelerate wear. For outdoor safety-critical messages, consider reflective films for night visibility, a protective laminate for abrasion resistance and an oversize pictogram to remain recognisable through grime. Where vandalism is likely, anti-graffiti laminate can make cleaning faster.
Guidance by environment:
- High UV/outback: UV-stable inks plus laminate; increase x‑height by ~20% to offset glare and dust.
- Coastal: 316 stainless fixings; seal panel edges; rinse with fresh water during maintenance cycles.
- Night/low light: RA1 for pedestrian speeds; RA2 for vehicular approaches and large yards; place signs where headlight cones will strike the face.
Artwork supply and scaling
Provide vector artwork (PDF, AI or EPS) for crisp icons at any size. If supplying raster images, export at sufficient resolution for the final dimensions. Include bleed if the design runs to the edge and keep vital elements within a safe margin to allow for trimming and fixings.
- Embed or outline fonts; avoid thin hairlines that disappear at distance.
- Specify hole positions and diameters on a separate layer or a clear dimensioned diagram.
- Use high-contrast colour combinations to improve recognition under variable lighting.
- We can match safety colours to established references (e.g. AS 2700 approximations) within tight Delta E tolerances—ask for a swatch if colour‑critical.
Delivery and handling
We ship Australia-wide, including regional and remote locations. Larger panels are packed with protective corners and interleaving to minimise transit rub. If panels exceed typical lift sizes, plan for two-person handling on site. For remote projects, grouping sizes to optimise freight can reduce overall cost and simplify delivery scheduling.
For bulk rollouts, we can palletise by zone, label cartons with room/area codes, and include install packs (fixings, site plans, proofs) so crews can work sequentially without opening everything at once.
Maintenance and replacement indicators
Safety signs do their job only while they are legible and correctly fixed. Establish a routine to wipe dust and salt, check for fading, inspect fixings and confirm that site changes haven’t obstructed the sightline. Replace signs that are cracked, delaminated, significantly faded or repeatedly defaced.
- Inspection cadence: monthly on construction sites; quarterly in warehouses; biannually in offices.
- Record keeping: photograph each sign in situ, log its asset ID and condition, and note any visibility obstructions.
- Trigger points: replace when text contrast drops below clear readability at the required distance, or when fixings loosen.
Cleaning tips: use pH‑neutral detergent and microfibre. For adhesives/paint transfers, start with isopropyl alcohol (IPA) and escalate to citrus‑based removers sparingly; avoid abrasive pads that can cloud laminates.
Repair and refurbishment
Not every damaged sign needs full replacement. Sign Portal can supply repair kits or refurbish panels to extend life where appropriate.
- Minor abrasion/graffiti: on-site application of anti-graffiti overlaminate or replacement clear film to restore gloss and cleanability.
- Edge lift on vinyl labels: clean with isopropyl alcohol, warm with a heat gun, re-squeegee; if contamination persists, we can supply an exact-die-cut overlay to re-face the label.
- Faded panel on intact posts: replace only the face panel, reusing posts/frames and hole centres to reduce downtime and cost.
- Broken fixings: upgrade to stainless hardware and increase fixing count on larger panels to reduce flex and future fatigue.
Every Sign Portal panel ships with a discreet back-of-panel job code. Quote this code to reorder, request a matching overlay, or book a refurbish so we can reproduce dimensions and hole patterns exactly.
Our typical refurb process: identify substrate condition (sound/unsound), measure gloss and colour shift against the original proof swatch, remove or mask damaged film, apply new printed overlay or clear laminate using felt and PTFE squeegees, then re-seal edges. For reflective headers, we can re‑skin only the RA1/RA2 strip to restore night performance without replacing the whole panel.
Common A-series dimensions
A-series formats are widely used in Australia for safety signs. Knowing the base dimensions helps you judge scale quickly when planning content and mounting space.
- A5: 148 × 210 mm (useful for close-up labels)
- A4: 210 × 297 mm
- A3: 297 × 420 mm
- A2: 420 × 594 mm
- A1: 594 × 841 mm
- A0: 841 × 1189 mm
Ordering checklist
Before you order, confirm the essentials so manufacturing and installation run smoothly:
- Final size in millimetres and orientation
- Material and any protective laminate or reflective film
- Hole locations/diameters or post centres (if required)
- Quantity, variable data, or sequential numbering if needed
- Delivery address constraints (e.g. forklift access, site hours)
- Contact for artwork proof approval and any site-specific notes
- Request our DXF/AI drilling template and ask us to print the job/reorder code discreetly on the reverse
At Sign Portal, rigid panels are direct UV printed on our flatbeds, then CNC routed; labels are printed and contour cut on our wide-format printer/cutter. This in-house workflow keeps sizes flexible and repeat orders consistent.
Our equipment, process and quality controls
We manufacture in-house for speed and repeatability:
- Printing: Mimaki JFX-series UV flatbeds for rigid panels; Roland/Summa print–cut for self-adhesive labels; colour managed with X‑Rite i1 spectrophotometry and device profiles.
- Finishing: Multicam CNC routing for ACP and plastics; Trotec laser for precision plastics; bevel/chamfer tooling for safe edges on hand-contact signs.
- Films and laminates: 3M and Avery Dennison graphics films, anti-graffiti overlaminates; reflective options in RA1 (Engineer Grade) and RA2 (High Intensity) where night visibility is required.
- Fixings: stainless hardware, 3M VHB tapes for compatible substrates, and jig-drilled hole patterns to match your post centres.
Quality and compliance:
- Preflight: AS 1319 layout check on applicable safety signs, font embedding, colour/contrast review and hole-position verification against your drawing.
- Proofing: PDF proof with dimensions and hole centres; optional colour swatch sign-off for brand-critical projects.
- Traceability: each job carries a batch code and material lot so future replacements match sheen and colour.
- Install readiness: installers with White Cards and SWMS; electrical test-and-tag for tools; public liability coverage for on-site works.
Our in‑process QC records hole positions to ±0.5 mm, panel squareness, and colour variance (average Delta E < 2 to the production master). On reflective builds, we verify class and lot against supplier certificates and note the sheeting orientation for consistent retroreflection.
Case studies: warehouse and construction deployments
National warehouse upgrade (Aisle and dock safety)
Scope: 4 sites, 312 signs (mix of A2–A0 ACP and equipment labels) across racking aisles and loading docks.
- Decision tool in action: using our distance estimator, main aisle mandatory signs moved from A3 to A2 to achieve a 35–40 mm x-height at 8–10 m.
- Materials: 3 mm ACP with RA2 reflective headers and anti-graffiti laminate near high-traffic dock doors.
- Process: laser-measured post centres; factory-drilled hole patterns; QR-coded asset IDs on reverse for reorders.
- Install: staged over two night shifts per site to avoid dock closures; scissor lift access with EWP Yellow Card operators and SWMS.
- Result (90 days): help-desk reports about “unclear signage” dropped by 72%; forklift near-miss reports at dock entries reduced by 18% quarter-on-quarter (client OHS log). Pick errors near restricted aisles fell 11% after regulatory signs were upsized and consolidated.
Major construction site (temporary perimeter and amenities)
Scope: 180+ temporary signs on fencing and amenities during a 14‑month build.
- Sizing: corflute A2 for pedestrian gates; custom 900 × 600 mm panels at vehicle gates for earlier recognition.
- Fixings: punched holes sized to cable-tie spec; reinforced corners on panels over 800 mm to mitigate wind flex.
- Durability: polymeric vinyl with UV varnish; overlay repair patches supplied in site kit for rapid graffiti removal.
- Logistics: staged deliveries by zone (north/south perimeter, tower crane base, amenities), each carton labelled to the site plan ref.
- Result: average replacement cycle extended from 10 to 16 weeks compared with the client’s prior supplier, reducing waste and site visits.
Ask us for a site-tailored sign schedule—we’ll map sizes to viewing distances, nominate materials by zone and include fixings so your installers can go straight to work.
Related Sign Portal resources: Custom Floor Decals for Safety & Promotions · Fire Door Safety Sign - Do Not Obstruct or Keep Open · Fire Safety Equipment - Fire Escape Right Sign
Frequently Asked Questions
Is A-series or a custom size better for workplace safety signs?
Use A-series for speed and simplicity. Choose a custom size when the mounting space is constrained, the message is long, or you need larger pictograms without wasting space.
What size should I use for a warehouse aisle safety sign?
Pick a size that remains legible from your typical approach distance. In many aisles, A2 or A1 works well; step up if text is dense or sightlines are long.
Can you make oversized safety signs in one piece?
Yes, we manufacture large rigid panels and can also tile designs into multiple panels if access or freight limits a single piece.
Do you print reflective safety signs for low-light areas?
Yes. Reflective films and protective laminates are available for improved night-time visibility and durability.
What file format should I supply for best results?
Vector PDF (or AI/EPS) is preferred. If using raster images, supply at sufficient resolution for the final size and include bleed if the design runs to the edge.
How much margin do I need around screw holes?
Keep critical text and icons well clear of hole centres. Provide a dimensioned diagram so we can place holes accurately during routing or punching.
Can I reorder the same custom size later?
Yes. We store production files and can set up customer-specific catalogues for easy repeat ordering through our Trade Portal.
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