well, I see that you have a standard sized drum set. I actually have the
Aquarian Studio Rings in those same sizes. So I found the link for you right here. This pack is EXACTLY what you need, if all you want to muffle are the toms. If you want to muffle the snare too, you're going to have to buy another 14" one separately.
Buy Aquarian Studio Rings Set #1 - 12",13",14",16" | Dampening Rings | Musician's Friend