I had quite a bit of left over brick from an old patio that was dug up. You can use salvage brick or buy new brick pavers from a store. If you get the standard brick pavers, those are typically 2” thick, you will just need more to create the height you prefer. The ones I used are 4” thick.
-Measure the height you’d want your tower to be, divide by the thickness of brick to determine about how many you’d need to get that height then times by 4 to get your total brick/ pavers
(Ex. I wanted mine to be about 3 feet (36”). My pavers are 4” thick. 36 divided by 4 =9
9x4=36. So I’ll need 36 brick.