INTERNATIONAL SIZE CHARTS (Metric CENTIMETERS) HOW TO MEASURE:
Find a similar style shirt in your closet, lay it on a carpet to provide friction, smooth it out until flat, but don't stretch it further than it naturally goes. Ladies measure approx 2" below pit, Men Pit-to-Pit.
Measurments are close estimates, cotton stretches differently each time you lay it out. You can expect maybe 1" of shrink in height and 0.5" in width after the first wash (visit the FAQ for washing instructions)... not to worry though, fine cotton stretches nicely and it shouldn't be a major concern... I personally wear a Medium in t-shirts, and these are no different!