México

Some kittens can wear them as early as age 12 weeks (3 months). 
To test, try a nail cap on first without the adhesive. If it looks too big, don't glue it on. The nail cap should fit snugly, like a glove. To accommodate younger kittens, you can trim the base of the nail cap making it smaller so it will fit your kitten's nail. 
 S - Small : (approximately 6 months old-approximately 6-8 pounds 2.5-4 kg) 
Some kittens at 5 months may need the small size if they are growing fast or are large-breed cats. Small-boned adult cats often wear the small size. If your cat seems smaller than an average full-grown cat, choose small. 
M - Medium : (approximately 9-13 pounds 4-6 kg) Most adult average size cats wear medium. 
L - Large : (approximately 14 pounds 6kg and up ) Very large-boned and large-breed cats wear large. Maine Coons, for example, are very large cats and generally wear large. 
Packing: OPP BAG 20 pcs/lot = 1 bags Nail Caps + 1 sets of Adhesive Glue and Applicator