Nipple shields.

Rissa • Dawson James 4/2/19 🍼💙 Sophia Rose 9/3/21

I got my nipples pierced in February of this year. I recently purchased the nipple shields in the picture. My question is, are nipple shields all that heavy? And what length of time would you recommend to keep them in? I don’t want to stretch the holes or make them sore. Thank you!