Vintage Deadstock Burlington Uniform Button-down Shirt size 32

Brand new, still in package, and crisp white vintage 70s long sleeve button-down collared shirt by Burlington. This classic dress shirt was likely intended for a unisex uniform or suit and has remained in package since the late 70s until removed for photo as shown. Made in Canada from a poly-cotton blend. It has multiple numbers printed on collar, but size is not clear from that. Please see measurements. Brand: Burlington Size: ? Measurements taken flat: PTP: 24” Length: 28”