This is a must have acrylic block. If you want to create a certain look you can place a lot of stamps on this block. This block is 7"x7" and 1/4" thick. You can use this block with the super large Photocentric,Inc Clear Acrylic Imagestamps. It is a great block! =)
This is alot thinner than other acrylic blocks which I think is great, however it is a bit tricky to hold (that's my only problem with this). Other than that I'm quite happy with it. It's lightweight easy to store and a nice size.
The thickness isin't shown so I'd say it's about the thickness of a cd case.