Welcome to Altra Running Footwear

Sizing Guide

Please see this guide to get the correct sizing for your footwear. You may visit an Altra Zero Drop Footwear dealer near you to try on a pair to find the correct size.

Men

USA   8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 14
UK   7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 13
EUR   41 42 42.5 43 44 44.5 45 46 46.5 47 48 49
UK   26 26.5 27 27.5 28 28.5 29 29.5 30 30.5 31 32

The Instinct runs slightly short in size. If you are between sizes please go up ½ size larger than your regular size.

Women

USA   5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11
UK   3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9
EUR   36 37 37.5 38 38.5 39 40 40.5 41 42 42.5 43
UK   22 22.5 23 23.5 24 24.5 25 25.5 26 26.5 27 27.5