This vintage Vietnam War Era Uniform Shirt is marked on the neck 13X30 55-S-1963. The inside bottom is marked SHIRTS, COTTON, STAND-UP COLLAR. Most of the bottom markings are unreadable. I measured the neck at 12 inches and from the center of the collar back to end of sleeve at 30 inches. It has 2 pockets with button flaps. The inside of the left pocket has 2 slots for pens etc. It is used with wear in good as obtained condition. There are a lot of small stains mostly on the inside.