Finally, the floor is dry :-)
Size XS fits my little Yorkie girl perfectly, she weighs about 2.5 kg. The nappies are very absorbent, and the Velcro fastening holds really well and can be used multiple times – we even get some “dry nights” :-). You just need to get the hang of putting them on, a bit of trial and error, but as someone mentioned, you have to pull them up – stretch them over the back and fasten them well (you can adjust them if needed). In my experience, they only slip off if you pick the wrong size, put them on incorrectly, or if they’re too full.