Warning sign - yellow triangle
Warning Signs
A warning sign is a yellow triangle with a black border and a black symbol. It tells people there is a hazard ahead, so they can slow down and take care before they reach it. These printable warning signs come as ready-made A5, A4 and A3 PDFs in portrait and landscape. Start with the general warning triangle and add your own wording, or pick one of the specific hazards: hot surfaces, sharp edges, crushing, low temperatures, moving machinery. Print at actual size, laminate, and fix them at eye level next to the hazard.
Warning (general) sign
Sign text: "Warning". PDF, 15 KB. A5, A4 or A3, portrait or landscape.
Buy a durable version
Rigid plastic, aluminium or self-adhesive warning signss, ready to put up. The pictures are our own free designs, not the Amazon products.
Rigid plastic warning sign
View on Amazon - Rigid plastic warning sign (affiliate link, opens in a new tab)
Self-adhesive warning hazard stickers
View on Amazon - Self-adhesive warning hazard stickers (affiliate link, opens in a new tab)
Also useful: A4 laminating pouches (protect a printed sign) on Amazon (affiliate link, opens in a new tab)
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Choose your wording
9 versions. Each one downloads as a PDF in A5, A4 or A3, portrait or landscape.
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Warning symbol (no text)
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Warning - text only (yellow)
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Warning hot surface
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Warning sharp edges
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Warning crushing hazard
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Warning machine starts automatically
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Warning low temperature
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Warning moving machinery
Download all 9 signs
Every wording, size and orientation in one ZIP file, 708 KB.
Print tips
- Print at "actual size" or 100%, not "fit to page", so the margins stay even.
- Use thicker paper or card (160gsm or more) if the sign will be handled.
- For outdoor or long-term use, laminate it or buy a rigid version.
Where to use it
- Next to ovens, hot pipes and radiators
- On machinery guards, conveyors and presses
- On cold-store and freezer doors
- Beside sharp edges, exposed metal and glass
- At the start of a work area where equipment can start without warning
Questions
What does a yellow triangle sign mean?
It is a warning sign: take care, there is a hazard here. The symbol inside shows what the hazard is.
Is a warning sign the same as a caution or danger sign?
In everyday use people mix the words. Our caution and danger listings carry the signal word in the text; this page holds the general triangle and the hazards that have no listing of their own.
Can I use these on public roads?
No. These are for buildings, yards and private land. Road signs are governed separately.
Will a paper sign last outdoors?
Not for long. Laminate it for indoor use; for outdoor or permanent use, buy a rigid or vinyl sign.
Related signs
Hazard Signs
Caution Signs
Danger Signs
Hot Water Signs
Electrical Warning Signs
Wet Floor Signs
Health and Safety SignsWarning class. A yellow triangle with a black edge warns of a hazard. All health and safety signs