DIY Messenger Bag Cut (2) 15”x 12” (main fabric – front and back of bag Cut (2) 15”x 12” (lining fabric) Cut (2) 4”X 12” (main fabric – side of bag) Cut (2) 4”X12” (lining fabric – side of bag) Cut (1) 13” x 4” (main fabric – bottom of bag) Cut (1) 13”