3/8 Grosgrain Ribbon Crafting, Packaging and Hair-Bows. We believe that our HairBow Center signature line of 3/8" (9mm) grosgrain ribbon is the finest available! 3/8" ribbons are small but mighty in the hairbow world! Whether it be lining alligator hair-clips or using as a center bow-knot, you will find this ribbon used in almost every hairbow! Other popular hairbow-making uses include korker bows, woven headbands, sculpture clippies, stacked-bow loops and surrounds, and of course, tiny little hair-bows! 100% polyester, Color-fast, Non-shrink, Washable and Dry-Cleanable. *50yd and 100yd reels may be spliced