Review on Magic Sliders L P 4225 4 Pack Round Sliders, 7/8"-1" Diameter, 1 Pack, White and Black by Brad Schaefer

I've been using these for years and they've always worked really well. But the ones I just got don't stay on the chair legs - they just bounce off after a few seconds before I can get them on all 4 legs. I thought I might have ordered the wrong size, so I ordered a few more sets in the next size up. They do the same. The dark brown material that wraps around the legs feels much firmer than those I've used in the past. One of the sets was 7/8 x 1 inch and looks a little smaller than the ones I replaced. The other was 1 1/8" to 1 1/4" and looked a little larger than the one I replaced. They don't seem to sell an in-between size, and even if there was, it probably wouldn't work any better because both sizes shoot the same way.