Dimensions: Post Diameter: 3.5" Overall Dimensions: 32"(L) x 27"(W) x 78"(H) Base Dimensions: 24" x 20" Playhouse Dimensions: 17"(L) x 14"(W) x 12"(H) Perch Dimensions: 15" x 15"

Mine holds perfect never had any problems, I have two chunks and it’ll hold both of them perfectly. 

The top two perches, where my cats mostly hang out, measure about 14 1/2" X 14 1/2" (not counting the cutout). The lower perch that sticks out is about 16 X 13 1/2. It's a great cat tree if you want a tall one but don't want a big footprint.

I last bought this in 2014, with three cats using it daily since. The material is definitely durable. I have just begun to have problems with nylon threads which were pulled from the carpet showing (a good pair of scissors to "shave" those off works fine). The bigger issue is the sisal rope - after a few years the rope will be scratched to the point of being ratty-looking. Still sturdily attached, still useable (and used) - just not attractive. Remarkably it never became unattached; it was well stapled on. Sisal rope is available to buy, and one can wrap it around the old and staple it on if you wish to hide the frayed layer below. I finally donated the post and bought another (2023). I will be very happy to get 8 years out of this cat tree, too.

I can't ell you the exact weight but it is heavy. Probably around 35 pounds. It's a great tree. My cats hide from each other and then pounce.