The Corkscrew Cat Tree is five feet tall with three platforms and three circular ramps for easy climbing. If you select the option for the top enclosure, it will bring it to four platforms and six feet tall. The levels are spaced eighteen inches apart. The ramps are twenty-six inches in diameter, so this is the width of the tree and it is one of the most compact yet versatile trees in the Cloud 9 product line. Its ramps (five inches wide) make it ideal for older cats to climb up to the top and, more importantly, to climb down without having to jump. With the optional enclosure, the cats can sleep inside or on top of it, making it a true four tier tree for a very small space.