1.25 Pound Weight Clips – Adds 2.5 Total Pounds - 1.25 Weight - Dumbbell Add Weight - Dumbbell Weight Clips - Weight Clip - Fractional Weight Plates (2 Clip Pack)

I got a pair of adjustable dumbbells for Christmas, 11-55lbs, with an 11lbs increment. I wanted to get a few smaller weights to make smaller increments ( a 2.5lbs and a 5lbs weight for each dumbbell). Does such a thing exist in a form-factor that is safe to use with a dumbbell? I was imagining a clip, or a "U" shape that I could hook on top of the handle. All I could find after a quick search was this guy, which is 1) kind of small, and 2) pretty expensive.