At what age should you start wearing a bra?

Tiffany • Arianna Lyn 5.19.10 💕 Natalee Sloan 10.19.18 👨‍👩‍👧‍👧

What age did you guys have you daughters or you even start wearing training bras? My daughter is going into 2nd grade next month and I'm wondering when I should start having her wear bras. I noticed this morning before daycare that I could see her nipples through her shirt so I made her go put on a cami but I'm wondering if it's bra time.