Set of 20 (10 colors, 2 of each color) I have checked the opening and closing. Please order the 10-color set as it is, as it will not be possible to make sets otherwise. Some items may have wrinkles, creases, or distortions. Zipper opening length: 20cm Total length: approx. 23cm Width: approx. 2.8cm 15cm and 25cm zippers are also available.