Vidagoods 71" Big Fat Cat Tree Condo Furniture Scratch Post Play House CARB2-Certified Wood Particle-Board Base Board Size :24" x 22"; 4 Posts covered by natural sisal rope Board Material : CARB2-Certified Particleboard Wood (The highest standard) Top Perches : 11"W x 11"L x 2.5"H (big area for big fat cat laying) Cat house: Faux Fur Wall Post Diameter is 3.5" (less than 3.5" is NOT good enough strong)