Description - Classic union suit/long underwear/pajama with a large rear flap that buttons at the top. It buttons up the front. It is a deep brick red color. I'm unsure of the content but it doesn't feel itchy to me. Allen A has been making union suits for over a hundred years but I think this one was made in the 1980s or 90s. 

Details

Brand - Allen A 

Size - S/M

Shoulders - 14.5" across

Chest - 16.75" pit to pit, stretches to 20"

Sleeves - 24.5" from shoulder seam

Waist - approx 16" across, stretches to 19"

Hips - approx 18" across, stretches to 21"

Inseam - 29.5"

Thigh - 8.5" across, stretches to 10.5"

Leg Opening - 3", stretches to 4.5"

Shoulder to Hem - 54.25"

Shoulder to Crotch - 29", stretches to 32.5"

Condition - I didn't find any holes or stains.