These are one-touch plus snaps that can be attached without tools. Size: 13mm 6 light blue pieces for 326 yen. Thank you. ※First, there's something I'd like to mention. Because the seller is a bit clumsy, I try to be careful before shipping to ensure the correct number of parts, but there may be inspection errors. Please check the items upon arrival. I cannot respond to inspection errors after evaluation, so please let me know of any issues before you leave feedback. These are one-touch plus snaps that can be attached without tools. Simply make a hole where you want to attach them and snap them together with your fingers, making it easy (^-^) If it's difficult, press them in on a flat table. The connection may be poor if the fabric is thin. One set (piece) consists of 2 heads, 1 genko, and 1 spring. No instructions are included, please refer to image 2. Other colors are also available. There are 12 colors: white, red, blue, black, pink, dark pink, light blue, yellow, yellow-green, brown, lemon yellow, and beige. You can mix and match, so please comment. 6 pieces: 326 yen 10 pieces: 522 yen, repeat customer discount: 502 yen 15 pieces: 722 yen, repeat customer discount: 692 yen 20 pieces: 922 yen, repeat customer discount: 882 yen 25 pieces: 1122 yen, repeat customer discount: 1072 yen 30 pieces: 1322 yen, repeat customer discount: 1262 yen 35 pieces: 1522 yen, repeat customer discount: 1452 yen 40 pieces: 1722 yen, repeat customer discount: 1642 yen 45 pieces: 1922 yen, repeat customer discount: 1832 yen 50 pieces: 2122 yen, repeat customer discount: 2022 yen 55 pieces: 2322 yen, repeat customer discount: 2212 yen 60 pieces: 2522 yen, repeat customer discount: 2402 yen If you are a repeat customer, please comment. Next shipment is undecided. Material: Plastic