Unicharm Cat Diapers, Manner Wear For those wondering whether to choose S or SS size! You might be tempted to buy a size too big, but it will leak if it's too big. (← Been there, done that) If it's too small, it will restrict your cat's movement and put a strain on them. (← Been there, done that) Buying a large quantity of the wrong size at the regular price is a waste... (← Been there, done that) So, here's a size trial pack (=^・^=) S size: 2 pieces SS size: 2 pieces Total: 4 pieces set. We plan to ship anonymously. * The 4 diapers will be put in one bag for shipping. The size is indicated on the waist part. Please refrain from comments asking for a price reduction m(_ _)m