Vintage 1960s Green and Red Plaid Shirt, Kaynee Endura Press Size Small/Medium

60s printed plaid button up shirt. It has a curved hem and one chest pocket Brand - Kaynee Content - 50% Polyester 50% Cotton Size - Labeled Size 20, 14 1/2 which is a Teen size. It's approximately a modern S/M but please check all measurements to insure fit Shoulders - 16.5" across Chest - 20.5" pit to pit Length - 28" Sleeves - 24" Condition - I don't see any flaws