This is iron-on stretch-stop tape. This is the straight type. The straight type is for shoulders, pocket openings, armholes, zipper areas, etc. The half type is for necklines, armholes, etc., and other small items. Please use according to the material. It is 1.2cm wide and 50m long, a set of white and black. Occasionally, due to the winding of the core or the adhesion of the glue, the volume may appear different. We will pack and ship using recycled materials.