>Elaine - yes the hex ones fit on a 12 lb dumbbell. In fact,
>they fit good on a 10 lb dumbbell too. Not sure about any
>lower than that since I have neoprene from 8 down. I believe
>you can start using the doughnut ones on 20 lbs and up.
Yes, the donut ones fit fine on a 20# or larger dumbbell.