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Warning, Safety and Hazard Signs for Vehicles and the Workplace

Size / Viewing Distance Guide

This table shows maximum viewing distances in 'good' and 'poor' light conditions. Please note that hese are a guidelines only - please refer to BS ISO 3864-1: 2011 for specific calculations. You can download a copy of the Health and Safety Executive's "Safety signs and signals" document by clicking here.

Sign Dimension (W x H mm)Max. Distance - Poor LightMax. Distance - Good Light
300 x 100mm6.6M11.8
450 x 150mm9.5M17M
600 x 200mm14.3M25M