Lululemon sculpt tank top size. Size 4 based on website measurements. 16 inches armpit to armpit Show your strength—this tank with a back cut-out is designed to fit over your straight-strap bra. Sweat-wicking fabric has a UPF of 50+ to help protect you from strong rays lycra® Added LYCRA® fibre for great shape retention stretch great shape retention long-lasting comfort mesh Mesh fabric panels for extra ventilation breathable lightweight sweat-wicking features Designed for: Run, train Loose fit: Gives you plenty of room to move Hip length: Layers easily