The top row has a diameter of 30mm. There are 10 pieces in total, but there are only 5 yellow, 6 green, and the red and blue ones are unopened. The left one in the bottom row has 3 remaining, the middle one is unopened, and the right one has 5 remaining. Used double clips will also be included (photo ③). Please let me know if you don't need them. Thank you for your understanding before purchasing.