HerRoom Response: If you are petite in stature, the chafing under your arms is understandable.
Response from the Designer at Elila: If you have chaffing at the under arm and the cups are too full, try the next size smaller; the cups will be shallower and the under arm will be lower. Since this is a posture bra, in order to accomplish the support necessary to reduce the stress on your back, a lot of fabric is needed on the sides and back to give the necessary support. I want to thank you for the feedback and I will take another look at the underarm length of the garment.