I have a Miniature Dachshund that experienced a back injury some years ago. As time has passed, while she is mobile, she has lost complete control of her bladder. I've tried several brands of disposable diapers in several sizes and have found the OUT XS/S to be a good choice at a very good price. The combination of the extra small and small size into one size seems to give more latitude in gaining a correct fit due to her petite waist. The extra sticky closure tabs hold very well. However, they are prone to collect hair which reduces their holding power significantly. I only mention this because I remove and re-install, her diaper, providing that it is not saturated, when she goes outside with her two friends. All in all I am very satisfied with this product at this time.