Scratching Post Sizes: How Tall, How Thick and How Stable a Post Should Be
Many scratching posts sold are too short and too wobbly for an adult cat, which is why cats ignore them and use the sofa. These are the heights, diameters and base sizes that work, plus flat and wall scratcher sizes compared.
A scratching post for an adult cat should have at least 30–32 in (76–81 cm) of scratchable height, so the cat can stretch to full length, on a heavy base of about 16–18 in (41–46 cm) square. The post itself is usually 3–4 in (8–10 cm) across; large breeds do better with 4.5–6 in (11–15 cm). Flat cardboard scratchers are typically 17–19 × 9–10 in (43–48 × 23–25 cm).
- Minimum height
- 30–32 in (76–81 cm)
- Base
- 16–18 in (41–46 cm)
- Post diameter
- 3–4 in (8–10 cm)
- Flat scratcher
- ≈ 18 × 10 in (46 × 25 cm)
On this page
Scratching post sizes compared
Cats scratch to stretch their back and shoulders, sharpen their claws and leave scent marks. A full vertical stretch is the main event, so height comes first. Horizontal scratchers suit cats that prefer to scratch rugs; most cats use both.
| Type | Size (in) | Size (cm) | Suits |
|---|---|---|---|
| Short post | 20–24 tall | 51–61 tall | Kittens; too short for most adults |
| Standard tall post | 30–36 tall, 3–4 diameter | 76–91 tall, 8–10 diameter | Most adult cats |
| Extra-tall post | 36–48 tall, 4–6 diameter | 91–122 tall, 10–15 diameter | Large breeds, multi-cat homes |
| Wall-mounted panel | 20–30 tall × 8–12 wide | 51–76 × 20–30 | Small spaces; fix at stretch height |
| Flat cardboard pad | 17–19 × 9–10 × 2–3 | 43–48 × 23–25 × 5–8 | Horizontal scratchers |
| Wave or lounge scratcher | 24–34 long × 10–12 wide | 61–86 × 25–30 | Scratching and lying on |
| Door-hanging scratcher | About 20–26 tall | About 51–66 tall | Doorways; check the door gap |
How tall a scratching post should be
An adult cat standing on its hind legs with its front legs stretched up reaches roughly 28–32 in (71–81 cm) off the floor, and large breeds more. The post should be taller than that reach, so the cat can sink its claws in at the top of the stretch and pull down along the post.
- Watch where your cat already scratches, such as a sofa arm or a door frame, and note the highest claw marks.
- Or measure the stretch: dangle a toy against a wall and mark the highest point the front paws reach.
- Add 2–4 in (5–10 cm) and choose a post with at least that much scratchable surface. The base and any top platform do not count.
A 32 in post on a 2 in base gives 30 in of scratching height, which suits most cats of about 8–12 lb (3.5–5.5 kg). For Maine Coons, Ragdolls and other large cats, look for 36 in (91 cm) or more. A cat tree with sisal-wrapped posts can do the same job if one post section runs at least 30 in without a platform in the way.
Post diameter and base size
The post must not move when a 10 lb cat throws its weight against the top. That depends on the base area, the base weight and how thick the post is.
| Post height | Post diameter | Minimum base |
|---|---|---|
| Up to 24 in (61 cm) | 3 in (8 cm) | 12–14 in (30–36 cm) square |
| 30–32 in (76–81 cm) | 3–4 in (8–10 cm) | 16–18 in (41–46 cm) square |
| 36–40 in (91–102 cm) | 4–5 in (10–13 cm) | 18–20 in (46–51 cm) square |
| Over 40 in (102 cm) | 5–6 in (13–15 cm) | 20 in (51 cm) or larger, or wall fixing |
These base sizes are practical minimums for solid wood or particleboard bases about 3/4 in (19 mm) thick. A lighter base needs to be larger. A simple test: push the top of the post sideways with one finger. If it rocks, a cat will feel it too. Screwing the base to a larger board or placing it against a wall corner fixes most wobbly posts.
Materials and how much surface they need
- Sisal rope: the most common covering, usually 1/4–3/8 in (6–10 mm) thick, wound tightly around the post. Cats shred it into fibers over months; rewrap rather than replace the post.
- Sisal fabric: a woven sheet stapled on vertically. Claws pull along the weave, which many cats prefer to the horizontal grooves of rope.
- Corrugated cardboard: used in flat and angled scratchers, with inserts that can be flipped and replaced. The edges must face up for claws to catch.
- Carpet: soft and cheap, but cats' claws snag in looped carpet, and a carpet post can teach a cat that carpet is for scratching. Avoid it if your floors are carpeted.
Sisal rope needed to rewrap a post
One wrap of rope uses the post's circumference plus a little for the rope's own thickness. For 3/8 in rope, there are 32 wraps per foot of post.
| Post diameter | Rope per foot of post | For a 30 in post |
|---|---|---|
| 3 in (7.6 cm) | About 28 ft (8.5 m) | About 70 ft (21 m) |
| 3.5 in (8.9 cm) | About 32 ft (9.8 m) | About 81 ft (25 m) |
| 4 in (10.2 cm) | About 37 ft (11.3 m) | About 92 ft (28 m) |
| 5 in (12.7 cm) | About 45 ft (13.7 m) | About 113 ft (34 m) |
With 1/4 in (6 mm) rope there are 48 wraps per foot, so you need roughly 1.45 times the lengths above. Buy 10% extra for the start and finish, which are stapled or glued.
Where to put a scratching post
International Cat Care and veterinary behavior guidance agree on placement: put scratching posts where the cat already wants to scratch. That means near where the cat sleeps (cats scratch on waking), by entrances to rooms it uses, and next to furniture it has been scratching.
- Protecting a sofa: place a tall post right in front of the arm the cat uses, at least as tall as the arm. Sofa arm heights are typically 22–27 in (56–69 cm); see the sofa dimensions guide.
- Several cats: provide at least one scratcher per cat, in different rooms, mixing vertical and horizontal types.
- Floor space: a standard post with an 18 in base needs about 2 × 2 ft (61 × 61 cm) of floor including room to approach. Fit it into a room plan with the furniture dimensions guide.
Keep scratchers away from the litter box and food bowls. A flat scratcher beside the cat's bed often gets the first scratch of the day.
Frequently asked questions
How tall should a scratching post be?
Tall enough that your cat can reach up with its front legs fully extended and still scratch downward, which for an average adult cat means 30–32 in (76–81 cm) of usable post. Measure your own cat: the height its front paws reach when it stands on its hind legs, plus a few inches.
Why does my cat ignore its scratching post?
The most common reasons are size and stability: posts of 20–24 in are too short for a full stretch, and a post that wobbles or tips is avoided. Placement matters too. Cats scratch near where they sleep and by room entrances, so a post in a back corner gets less use.
How do scratcher sizes compare?
Short posts are 20–24 in (51–61 cm), standard tall posts 30–36 in (76–91 cm) and extra-tall posts up to about 48 in (122 cm). Flat cardboard scratchers are about 17–19 × 9–10 in; wave and lounge scratchers are 24–34 in (61–86 cm) long; wall panels are usually 20–30 in (51–76 cm) tall.
How much sisal rope do I need to rewrap a scratching post?
With 3/8 in (10 mm) rope, allow about 32 ft per foot of post on a 3.5 in post and about 37 ft per foot on a 4 in post. A 30 in post of 3.5 in diameter needs about 81 ft (25 m). Thinner 1/4 in rope needs about half as much again.