All shoe sizes listed on the website are in US sizes.
Performance SHOE SIZE GUIDE*
MEN'S SIZES                                  
US 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12
UK 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11
EU 36 37 37.5 38 39 39.5 40 40.5 41.5 42 42.5 43.5 44 44.5 45 46 46.5
CM 22.5 23 23.5 24 24.5 25   25.5 26 26.5 27 27.5 28   28.5 29 29.5
WOMEN'S SIZES                                  
US 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12      
UK 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10      
EU 36 37 37.5 38 39 39.5 40 40.5 41.5 42 42.5 43.5 44 44.5 45 46 46.5
CM 22.5 23 23.5 24 24.5 25   25.5 26 26.5 27 27.5 28   28.5 29 29.5
YOUTH SIZES                                  
US K10 K11 K12 K13 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
EU 27 28.5 30 31.5 32.5 33 33.5 34.5 35 35.5 36 37 37.5 38 39 39.5 40
CM 17 17.5 18.5 19.5 20 20.5 21 21.5 22   22.5 23 23.5 24 24.5 25  
NOTE
Toddler (TS): Sizes K4-K9
Pre-School (PS): Sizes K10 - 3
Grade School (GS): Sizes 1-7

*All performance styles INCLUDING all Gel-Quantum Infinity, Gel-Quantum 90, Gel-Qunatum 180, Gel-Quantum 360 and Gel-Kinsei OG styles. See Sportstyle Size Guide below for remaining Sportstyle range.


SPORTSTYLE SHOE SIZE GUIDE

All Sportstyle styles EXCLUDING all Gel-Quantum Infinity, Gel-Quantum 90, Gel-Qunatum 180, Gel-Quantum 360 and Gel-Kinsei OG styles.

SPORTSTYLE ADULT SHOES
US MENS/UNISEX   4   5   6   7   8   9   10   11   12   13 14
US WOMENS 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15
EURO 35.5 36 37 37.5 38 39 39.5 40 40.5 41.5 42 42.5 43.5 44 44.5 45 46 46.5 47 48 49
CM 22.5 22.8 23 23.5 24 24.5 25 25.3 25.5 26 26.5 27 27.5 28 28.3 28.5 29 29.5 30 30.5 31
SPORTSTYLE KIDS SHOES
US 1 2 3 4 5 6 7
EURO 32.5 33.5 35 36 37.5 39 40
CM 20 21 22 22.5 23.5 24.5 25.25