Depth/Pin for breasts?

I’m planning on needling my breast skin, it’s pretty minor thin/crepey skin from weight loss and my boobs are already quite small with decent fat amount so I’m not looking for volume or a miracle, just some tightening.

I have everything I need to get started..just not 100% sure on what depth and pin size is needed. My pain tolerance is very high so that’s not an issue. I’m just looking for results within 6 months! I’ve seen amazing results with crepey belly skin.

Have been scouring for this information but can’t quite find what I’m looking for. Any advice on size, pre-needle or post care is greatly greatly appreciated.