Numbers on this chart represent measurements of the actual garment and not of the person wearing it. To figure out your size: take a piece that fits you well, lay it down flat, and whip out the tape measure. Compare your results with the numbers here, and choose your size accordingly.
Familiarity: I returned this product before using it
I bought this for my wife and although she wears a L in TLD jerseys a L in this tee was way to small. Very tight in the hips and bust. Very good quality and feel on the shirt, just too small for her liking so she returned it.
My wife is 5'5", 135 lbs, 34D and normally wears a Large in shirts and jerseys.