Such a cool piece! Vintage Rainbow Multicolor Checkered Plaid pattern. Front button closure. Shoulder pads (can be removed). 2 front slip pockets. Collared. Theres no size tag, but fits like a modern day medium / large. Please see the following exact measurements / feel free to ask any questions to be certain.
1980s -1990s
Laying flat, buttoned, Unstretched, and measuring across side to side:
pit to pit-22. 5”
waist- 21”
length- 27”

This item is sold from an excellent, highly rated vintage seller in Chicago, Illinois.