Take an item that currently fits you, lay it out flat and measure to the guide above.

T-Shirt Sizing (IN)

Sizes	Width (IN)	Length (IN)
Youth XL	19	25
XS	16 1/2	27
S	18	28
M	20	29
L	22	30
XL	24	31
2XL	26	32
3XL	28	33
4XL	30	34
5XL	32	35

Long Sleeve Shirt Sizing (IN)

Sizes	Width (IN)	Length (IN)
S	18	28
M	20	29
L	22	30
XL	24	31
2XL	26	32
3XL	28	33
4XL	30	34
5XL	32	35

Hoodie / Sweatshirt Sizing (IN)

Sizes	Width (IN)	Length (IN)
Youth XL	20	25 1/2
XS	19	27
S	21	28 1/2
M	23	29 1/2
L	24 1/2	30 1/2
XL	26 1/2	31 1/2
2XL	27 1/2	32 1/2
3XL	28 1/2	33 1/2
4XL	30	34
5XL	33	35