what is ball girth

Ball girth refers to the measurement of the distance around the toe box of a shoe at its widest point, typically at the metatarsal heads. It is also known as the joint girth. To measure the ball girth of your foot, you can use a household tape and measure the widest part of each foot, placing the tape measure behind the toes. The ball girth is an important measurement for shoe sizing and is used to create custom shoe lasts. It is measured between the first metatarsal and fifth metatarsal joints. Some shoe size charts include the ball girth measurement along with other measurements such as foot length and circumference.