Stiff wires can be uncomfortable or even painful for developing tissue; stick to soft cups and bralettes while you're still growing.
The band should sit level across your back, and you should be able to fit two fingers under it comfortably. Popular First Styles teen tits and lingerie
Highly recommended as a first step; they are stretchy, cozy, and don't have uncomfortable wires. Stiff wires can be uncomfortable or even painful
Essential for PE or sports to reduce bounce and provide maximum support. they are stretchy