Abstract: An adjustable inner breast cup insert assembly for a woman's swimsuit or garment such as a leotard, dancewear, etc. The inner breast cup insert assembly comprises two breast cups connected at a midsection. Each breast cup contains a vertical extension and a side extension. Attached to the vertical extensions and side extensions of the breast cups is fastening material such as hook and loop type fasteners. On an inner side of the shoulder area and side seams of the under arm area of the swimsuit or garment is attached complimentary fastening material. The fastening material of the inner breast cup insert assembly is connected to the fastening material of the swimsuit or garment, thereby securely anchoring the insert assembly to the swimsuit or garment and providing proper fit, choice of size, proper support, comfort, shape and desired look to a wearer.