Simplicity 7399; ©1967; Boys' Pajamas in Two Lengths. The pajama top has front button closing, set-in sleeves and patch pocket. V. 1 & 2 have notched collar. V. 1 & 3 have long sleeves. Collarless V. 3 & 4 have "V" neckline. The pajama pants with elastic waistline casing has fly front closing with snap fasteners. V. 1 & 3 are regular length. V. 2 & 4 are short length