For an easy custom sweatshirt, add grosgrain ribbon and mini-ball fringe to the band and finish the design with embroidery. First, measure the band of the sweatshirt to determine how much ribbon you will need. Because this fabric may stretch as you sew, allow for this by adding a few inches to your ribbon measurement. Sew mini-ball fringe to the underside of the grosgrain ribbon. Then stitch the ribbon to the band of the sweatshirt, using the seam between the shirt and the band as your guide. Add a monogram or applique design to complete your one-of-a-kind sweatshirt.