The small size works well with miniature patchwork, doll clothes, and all work that requires holding pieces together in tight sections. 20pc/pack (10 blue/10 red) Features Clip is small and strong, opens wide [5/16″ (8mm)] & has a firm grip Clip base is flat for easy feeding to the presser foot Seam allowance markings of 1/4 (7mm) and 1/2″ (12mm) Caution: Remove clip before feeding fabric under the presser foot Materials Polycarbonate Stainless Steel