From the Knit Picks Website:
Inspired in Birch Bay, Washington, this sweater is knitted all circular, easy to knit, yet impressive looking with the large color panel. For the sleeves I have given the knitter 2 options: tight sleeves with a rapid decrease or a more traditional look with gradual decreases as you work the sleeves from the shoulder down to the cuffs. No blocking, no sewing! Just my style.

Sizes
XS - 36” chest circ
S - 39” chest circ
M - 42” chest circ
L - 45” chest circ
XL - 48” chest circ
2X - 51” chest circ
3X - 54” chest circ

Needles:
Size 8 (5.0mm): 16” and 24” circular & DPNs
Size 7 (4.5mm): DPNs 16” circular 1 to 2 sizes smaller than main needle size

Ed. note: Could also be worn by women. Use actual measurements to determine size.