Get a perfect fit. Just grab your favourite tee, lay it flat, get a tape measure & take a few measurements. Then pick the closest matching shirt from the chart below. Easy!
If you are in between 2 sizes always go for the larger, chances are your favourite tee has shrunk a little since you got it.

Men’s (Unisex)	S	M	L	XL	2X
Width (inches)	18	20	22	24	26
Length (inches)	27	28	29	30	31

Women’s	S	M	L	XL	2X
Width (inches)	17	18	19	20	22
Length (inches)	25	26	27	28	29

All measurements may vary by +/- 1 inch.