I have purchased Weaver rubber bell boots as my go to. I haven't used these ones yet but I have used them in the past and love them. They don't rub and last a relatively long time. One pair lasted almost a year of 24/7 wear. My second pair my horse managed to lose one but shoe stayed on, the single one of this pair I have left is still in great shape. These bell boots are just as good as the three times as expensive Italian rubber bells. These are true to size, XL fit my size 2 shoe warmblood well, maybe just a smidge big, with some room for movement. These are relatively easy to put on and take off, compared to some other pull on bell boots.
The only thing that was weird was that I ordered the gum rubber and got black this time, but the color doesn't really matter to me as long as they aren't white.