sizing_brooks_footwear_womens-footwear

CA 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5
Euro 35.5 36 36.5 37.5 38 38.5 39 40 40.5 41 42 42.5 43 44
UK 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5
CM 22 22.5 23 23.5 24 24.5 25 25.5 26 26.5 27 28 28.5 29

Select width

For men's footwear, D is standard, B is narrow, 2E is wide, and 4E is extra wide.
For women's footwear, B is the standard width. 2A is narrow, D is wide, and 2E is extra wide

Be careful, for this model ( BRO-110181 : Adrenaline GTS 15 Men's) on website, the width size is B