WW2 US Army Air Force A-4 Flight Suit Heavily Modified Sep 19, 2025 | army | admin | WW2 US Army Air Force A-4 Flight Suit Approximated Size 32 – Modified. Waist was trimmed down. Zipper was replaced. Many war time repairs. Armpit to armpit 20.1. Shoulder to shoulder 17. Collar to crotch 33.