Default courier] YTO ExpressInner length = foot length plus 0.5, plus 1cm for wide feet Buyer's note: When purchasing, do not look at the size code, please look at the inner length The inner length of the shoe is the length of the upper part where the insole is measured (Note that due to different measurement methods for each person, a length error of up to 0.3cm is normal. If you mind, please do not purchase.) The price of a pair in our store is also the wholesale price. If you purchase one or two pairs without consulting customer service, please place your order directly. Due to very detailed reasons, the item must be returned, and all return shipping costs are to be borne by the buyer.The processed payment does not support returns. Size 16, inner length 11.5 Size 17, inner length 12 Size 18, inner length 12.5 Size 19, inner length 13 Size 20, inner length 13.5 cm Size 22, inner length 13.4 cm Size 23, inner length 14 Size 24, inner length 14.5 cm Size 25, inner length 15 Size 26, inner length 15.5 cm