Here is a super cool vintage long sleeve sweater by Jantzen. Feels like it could be a wool blend, and made in the USA. Handsome off white fabric throughout. Vee neck, and wonderful cable knit details. Nothing fancy, just timelessly classic and good looking, and in excellent shape with tons of life left! The tag says Medium, but here are the measurements. (refer to the last pic above to see how I measure shirts.)

Chest (armpit to armpit) 22"
Shoulder to end of sleeve (including cuff) 25"
Length 27"

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