Snaps Buttons, Lance Home Snap 300 T5 Snap Plastic Buttons Poppers 20 Colors for Cloth Diaper 1. Each pack has 15 sets( 1 set includes 2 Caps 1 stud and 1 socket); 2. Easy to use and quite straight forward to operate! 3. Size: 20 , also call T-5. Size 20 is often use in clothes diapers; 4. All these 20 kinds of colourful studs are great for making fastening more decorative especially on cushions and covers. You can match the colours to the material you are using. 5. To apply these poppers buttons, you need one set of press pliers. Cut a hole, insert the spike and close with the coupler. Repeat on the closing fabric and you are done!