The botton was a spool that Mike got off the Job... 2 ft. wide... The post is 2- 2X4's glued and screwed together and the top perch is one circle off of another spool, 16 inches wide. The whole thing is only 31 inches high and the cat we made it for is a big one. Chester weighs 15 pounds and the top perch holds him with no problem. MIke always puts enough screws in it so it won't come apart or tilt over. Once you figure out what demintions you want it and how many perches, the rest is easy... We try to get the materials free and work with what we have...scraps of carpet, scraps of lumber, the spools.. We do have to buy sisal rope if we want to use any on them but we found a source that is cheap for that and the spray on glue, screws, nails and stapels. Feel free to save the pic of this one... but we always start with one plan and end up with another..... Once started, the ideas just FLOW!