18 Inches

[Top Plush Perch] The top perch is covered with long hairs for extra softness, provides cozy and enough place for your kitten to stretch or yawn on it. The hairs are well attached to avoid spreading around the house [Sturdiness and Stability] Short but stable, thanks for the strong P2-grade particle wood and strengthened base plates, also compact design secure stability so this kitty climber won’t shake or fall down when your cat jumps in or out [Scratching Sisal-post] The reinforced scratching post to keep your furniture safe and allow your cat to have a fun way to exercise