The patterns for this Butterick B6531 Copyright McCALL’S® Company, NY pattern are:

TOP, TUNIC, SHORTS AND TROUSERS (J. WOMEN/MEN/KIDS/BOYS/GIRL): Loose-fitting, pull-over top and tunic with front fastening with snap buttons, contrasting front and back yoke, and back pleats in the yoke. B: Contrasting sleeve bands, shaped hemline. Loose-fitting trousers and shorts with straight leg and elastic waistband.

You can use materials such as:
FABRICS: Medium stretch knit (35% in width): Jersey, Interlock, Fancy jersey, Sweatshirt jersey. C, D: additionally Flannel, cotton, Canvas. Large diagonals are not suitable. *With Sens. **Without Sens.

Size guides can be found in “affiliation”