There are several things to look for in determining a good fit: • The bottom band should sit straight across the back. If the band rides up, check that the straps are a proper length. If the straps are fine, tighten the band or try a smaller band size. • The bottom band should be snug, but comfortable. You should be able to run two fingers underneath the band. If you can fit more than two fingers, tighten the band or try a smaller band size. • There should be no puckering in the cups. If there is extra fabric around the cups, try a cup size smaller. • The breasts should not spill out of the cups or the sides. If the cups cut into the breasts, bulge at the top of the cups or spill at the sides, try a larger cup size. • The shoulder straps should sit comfortably at the shoulder. Straps should not be slipping off, nor digging into the shoulder. Visit our how to size guide »