Sep 08, 2021 - 09:14 AM
Hello. We always factor a few inches into the design for layering, freedom of movement, etc. So a Large would leave you about 4 circumference inches of extra room at the armpits; an X-Large would be about 5 inches.
I hope that this helps, but please get in touch with us at 1-800-783-8326 or firstname.lastname@example.org if you have any questions and we'd be happy to help.