We have 22 therapy magnets. 20 are the large 2" magnets with 5200 gauss. Two (round ones) are 1500 gauss.
Here is a link to Amazon that gives a full description and function. One has had the leather trimmed (we trimmed it to fit into a pouch that my wife used) however, it obviously won't affect the magnet.
The larger ones are more expensive. The Amazon listing says the kit they are selling goes for $140. Other kits are $99. So ours is half price or much, much less. Except for the one that has been trimmed, they're in perfect condition.