Very rare shirt!
25" from top to bottom (see pictures).
17" from side to side (see pictures).
Would appear to fit like an M/Medium.
Single stitch, made in USA. 
Shirt was loved and worn.

Shirt has been washed 10+ times but still has a scent of mothballs. 
Maybe you have a special trick to get rid of the smell but please bid/buy with this in mind. 
Please see pictures for measurement references.