Dimension: Men's 4mm  Women's 3mm，  Men's size 7~12 Women's 4~9.5 .  **********Choose the size for 2 pcs set**********  The front 2 or 3 digit is for Men's size and the last 1 or 2 digit is for Women's size.  (example1) : 70.4  = 1pcs Men's 7 + 1pcs Women's 4， (Example2) 105.95 = 1pcs Men's 10.5 +  1pcs Women's 9.5   Nickel and Lead Free，  High Quality Fashion Ring