Mens toupee come in different sizes, and the standard medium size is a size that fits most people, but you should measure your head before purchasing. Measure with one end of the measuring tape at the front edge of one ear. Then, extend the rest of the video to the other ear's head. Please make sure the tape measure is flat for accurate measurement. Head circumference is also important. Place one end of the video in the middle of your bangs and spread it across your head. Please write down the number and present it to the wig store or manufacturer.