Find the perfect fit tee with this handy-dandy chart.

All measurements are in inches.  What the What!? How does this work you ask?  Well take your favorite fitting tee and measure it along the lines below, that'll tell you what size to get.  The Bearded Heart Tees run a tad bit small so you may want to size up, unless you want to show what you got and I can't blame you for that!