Dimension: Men's 4.5mm Women's 4mm， Men's size 7~12 Women's 4~9.5 . Regarding choose the size for 2 pcs set. The front 2 or 3 digit is for Men's size and the last 2 digit is for Women's size.  (example1) : 70.40  = 1pcs Men's 7 + 1pcs Women's 4， (Example2) 105.95 = 1pcs Men's 10.5 +  1pcs Women's 9.5