Trixie Nappies for Male Dogs

I was tempted by the price, they're not terrible, the fasteners hold well, but the nappy tends to slip off and that's because my dog should have a smaller size, but that one wouldn't fit, so the Velcro is just about right, but the nappy is too wide, which causes a bit of discomfort. Also, it leaks—it absorbs up to a point, but quite often after a night, my old dog unfortunately had wet fur because the nappy left damp patches.