Sizing guidelines: For the best fit, measure the length and width of outsole of your footwear (for width, measure widest area of shoe/boot) and then compare with the inside dimensions of NEOS overshoes.

Size Medium: inside length 11-1/2", inside width 4-3/8"

Size Large: inside length 12-1/2", inside width 4-1/2"

Size XL: inside length 12-3/4", inside width 4-5/8"

Size 2XL: inside length 13-3/8", inside width 4-3/4"