100pcs = 5x 20pcs ZETPO Soft Nail Caps for Cats + 5x Adhesive Glue + 5x ApplicatorCat Size ChartXS (Extra Small) kittens up to about 5 pounds generally fit the extra small size.S (Small) approx. 6-10 pounds. Small-boned adult cats wear small.M (Medium) approx. 10-16 pounds. Most adult average size cats wear medium.L (Large) approx. 16 pounds and up. Large-boned cats wear large.Application* First, take one of the nail caps out and try it on your cat's nails without the glue. It should fit like a sock.* Trim the nails to the same length with that of the nail caps. If the nail cap is too large, you may trim the open end of the nail cap until it fits. FOR KITTENS: Do not trim kittens claws before applying nail caps. You will need a sufficient claw surface for the glue to adhere properly.* Fill the nail cap with little adhesive. Never fill to too full to prevent overflow of the adhesive. Wait the adhesive is half-dried in the nail cap.* Grasp claws of the cats, slightly push aside the hair on the nails and expose all of them. Put the nail caps onto the claw and make sure they are completely wrapped. Wait until the adhesive is dry and continue with the next one.* After all caps are applied, observe the cat for at least five minutes to make sure nail caps are secure. A good tip is to feed your cat his or her favorite food immediately after applying all nail caps.* Some cats will try to bite away the nail caps after they are initially put on. Once it happens, immediately cry it down until they are used to the caps. But please don't worry, it is quite normal. If it is necessary to replace with new nail caps, just take off the remaining nail cap materials and clean the nails. Nail caps should always be replaced after 8 weeks.