Junk Jeans People, Buttonhole Smart Marks- Adhesive & Water Soluble; Smart Marks are evenly spaced Vertical and Horizontal Buttonholes. Tape, Stitch & Spray Away! 18 of each direction included. Helps to stabilize knits and easily visible on light, dark & printed fabrics! Bonus if closer spacing is desired, simply cut tape and re-position using gray 1/4" marks provided.