Road Sign Size Calculator

Find the sign size the MUTCD requires for your installation. Pick a sign, pick the road type, and get the standard size with a direct link to the right product. Based on the national MUTCD, 11th Edition (December 2023).

Step 1 - Find your sign
Step 2 - Where will it be installed?
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How road sign sizes work

The MUTCD (Manual on Uniform Traffic Control Devices) sets sign sizes by road type, not by preference. The faster and wider the road, the bigger the sign: a Stop sign is 30 x 30 inches on a two-lane street, 36 x 36 on a multi-lane road, and 48 x 48 where drivers need more reaction distance.

Minimum sizes are permitted only on low-speed, low-volume roads such as private drives and parking facilities. Oversized versions are recommended wherever speeds, traffic volumes, or sight distances call for extra emphasis. When in doubt, go one size up - the MUTCD always allows a larger sign.

Work zone versions of a sign use their own size table and an orange background. If you are signing a construction or maintenance area, switch the calculator to Work zone to get the right size.

Reference tool based on the national MUTCD 11th Edition sign size tables (2B-1, 2C-1, 6G-1, 6H-1, 6I-1, 7B-1, 8B-1). Larger sizes may always be used when appropriate. State MUTCD supplements can modify these sizes - verify with the agency having jurisdiction before ordering for public roads.