Great alternative to pins and do no damage to fabric for many craftsEasy to see on your work and easy to find when dropped on the floorThe flat bottom of each clip has marking lines for 5 mm， 7 mm， and 10 mm， so you can measure how far the clip is reaching in from the fabric edge.Material: PlasticColor: Clear and RedSize (L*W): Approx. 2.8*1cmNote: There are may be 1-3 error due to manual count， hope you can understand， thank you. Package includes:50pcs x sewing clips