Hello: 1. Our US size is not the US standard size, please choose the size according to your foot length. 2. China size is usually smaller than EUR, Russia, Brazil size, please choose the size according to the foot length. 3. Generally, the length of the insole will be longer than the length of the foot (0-1.5) cm to maintain the fit of the foot; but if the shape of the toe of the shoe is pointed, then the length of the insole will be longer than the length of the toe (1- 2.5) cm. 4. We support retail, wholesale and delivery. If you have any questions, please feel free to contact us. Direct sales support