x-small
x-small | 0-9m | approx 6.25″ x 7.75″
small
small | 0-12m | approx 7″ x 7.75″
medium
medium | 3-18m | approx 7.25″ x 8″
large
large | 6-18m | approx 7.25″ x 8.25″
