There is no age minimum. We do recommend any girl playing contact sports with or without breast development to wear the inserts as they will protect even the flat chested from potential injury to the breast bud.
Refer to our size chart, it’s very simple to follow. If in store, simply hold the inserts over your breast. If fits & is comfortable then that’s your size!
Get in touch with our customer care team here and they will get back to you as soon as possible.