Overall size : 33" W x 22" L x 72" H. Base board size : 23.5" W x 21.5" L. Size of big condo : 18" W x 12.5" L x 11.75" H. Size of Top Condo : 12" W x 12" L x 10" H. Top 3 Perches : 12.75"W x 12.75"L x 2.25"H. Posts covered by natural sisal rope. Easy to assemble with step by step instruction and tools included.