If you’ve never worked with avatar 2.0, chest size comes in a 4 sizes solution: Flat, small, normal, large. It’s usually what stops a lot of creators from supporting this body properly, but it isn’t THAT bad really, as long as you do your work on the normal size, you don’t have too much to do in term of adjustments.

The doodles all use the same space but I’ve adjusted the UVmapping for each chest type to account for distortion.