Vintage Pearl Snap Western Plaid Flannel Shirt

This cool vintage shirt is in excellent condition. There is some very minor pilling, but that should be expected for a short this age. The shirt is flannel, but is worn from the years, so now it's more of a heavyweight cotton. The button are all pearl snaps and none are missing. There isn't a tag with the maker on it, but it is definitely vintage! The size tag reads 15-34. I am pretty sure that 15 is the neck measurement, but I don't know what the 34 means. Approximate Measurements: Shoulders 16" Chest 20 1/2" Length 28" Arms 26"