Armarkat 72" Solid Wood Cat Tree Board Material: Solid Wood Post Diameter: 4.5" and fully covered with sisal rope Overall Dimensions: 41"(L)X36"(W)X72"(H) Base Dimensions: 24" X 24" House Dimensions: 18"(L)X18"(W)X12"(H); Perch Dimensions: 18" X 18"