Here is a cool vintage long sleeve shirt by Penney's, under the Town Craft label. It's white with very nice orange, purple, yellow and green striping. It's 65% polyester and 35% cotton. And see the last pic for a small dot on the back of the collar. Not sure if it was a blemish in the fabric, ink? Who's to say? Here are the measurements. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 20"
Shoulder to end of sleeve (including cuff) 22"
Length 30"

This item is sold from a vintage boutique in Roanoke, VA.