Made of thin rayon /poly/ spandex jersey, pre-shrunk. Bottom edge and insets are fancy trimmed elastic.
RIBCAGE SIZING: S=33", M=35", L=38"
Measure your ribcage, under arms, above your bust, arms down!; whatever your measurement, pick the size at or slightly larger than you. e.g. if you measure in at 34", you need a M.
BICEPS S-9 1/2" M-10 1/2" L-11 1/2"