Scratch Post vs Pad: 90 cm, Sisal, 3-Month Replace

Roughly 7 in 10 cats choose a vertical post over a flat pad when both are offered at the same distance, so a 90 cm sisal post is the default purchase and a corrugated pad is the supplement for senior cats. Height is where most posts fail: a 40 cm post lets a cat scratch, but not stretch, and stretching is most of the reason the behavior exists. Replace the scratching surface every 3 months, because a worn post stops working before it falls apart.

Why vertical wins

Scratching does 3 jobs at once: it sheds the outer nail sheath, it stretches the shoulder and back muscles, and it leaves a scent mark. Only the vertical version does all 3. A cat on a post stands on its hind legs, reaches 90 to 110 cm, and pulls down through the front claws, which is the movement that actually separates the old sheath.

A flat pad gives a horizontal drag of 20 to 30 cm and no stretch. That is still useful, especially for cats over 12 years with sore hips, but it does not replace the post. The pad is the second surface, not the first.

The 90 cm number, explained

A typical adult cat is 45 to 50 cm from nose to tail base, and stands 23 to 25 cm at the shoulder. A post has to be tall enough for the cat to reach up with both front legs extended: that is roughly twice body length, or 90 cm for most adults. Posts under 60 cm force the cat to scratch crouched, which many refuse to do.

Adjust for size. Kittens at 4 to 6 months do fine with a 60 cm post and will need a 90 cm one by 10 months. Maine Coons and other large breeds need 110 to 120 cm, and a 15 kg base. If you are unsure of the adult size, the breed quiz gives a weight range that maps to post height.

Sisal against corrugated

Sisal rope at 8 mm, wrapped at 45 degrees and stapled at both ends, lasts about 3 months of daily use by 1 cat. It gives a rough, splintery drag that suits full extension, and it can be re-wrapped for $10 to $20 instead of replaced. The refill walkthrough covers the wrap tension and staple spacing.

Corrugated cardboard at 5 mm cuts faster but crumbles: expect 4 to 6 weeks of heavy use, 8 to 10 weeks for a light scratcher. It is cheap, $8 to $25, and cats that dislike rope often accept it. Carpet-covered posts are the worst of both: the pile snags claws and the cat cannot sink them, and many cats avoid them entirely.

Type	Height or thickness	Material	Life (months)	Price (USD)
Vertical post	90 cm	8 mm sisal	3	45-120
Flat pad	5 cm thick	5 mm corrugated	1-1.5	8-25
Kitten post	60 cm	8 mm sisal	3-4	30-60
Large-breed tower	110-120 cm	10 mm sisal	4-6	120-260
Refill only	90 cm of rope	8 mm sisal	3	10-20

How many, and where

One post per cat, plus 1. Two cats need 3 surfaces, placed in 3 different rooms: next to the sleeping spot, within 2 m of the main doorway, and beside the window where the cat watches the street. A post in a back bedroom gets used 1 to 2 times a week; a post next to where the cat already naps gets used 10 to 20 times a day.

Height of the surface matters as much as the post. Mount a pad at 25 to 35 cm if the cat is a horizontal scratcher, and put it flat on the floor at first. Do not move a post once the cat has marked it; the scent mark is the invitation.

When the cat ignores a new post

Check 4 things in this order: wobble, height, surface and position. A post that rocks 2 cm at the top is unusable; most cats test it with 1 paw and walk away. A post shorter than 60 cm, or covered in carpet, fails the surface test. A post in a traffic-free corner fails the position test.

Then make it obvious: rub 1 pinch of catnip or silvervine on the top 20 cm, dangle a wand along the rope for 2 minutes, and feed the cat at the base for 3 days. Most cats convert within 7 to 10 days. If a cat that used to scratch a post stops at 10 years or older, that is a pain sign, not a preference, and a vet visit comes before a new post.

The 3-month replacement cycle

Replace or re-wrap when 50 percent of the rope is frayed flat, when loose strands pull out by hand, or at 90 days of daily use, whichever comes first. A worn post still standing is the most common reason a cat returns to the sofa: the surface has gone slick and no longer grabs the claw.

Corrugated pads go sooner: flip them at 3 weeks, replace at 6 to 8 weeks. Keep 2 pads so one can be swapped while the other is out. Write the install date on the base with a marker; nobody remembers a 90-day cycle without it.

Safety and daily checks

Supervise daily, and do the 30-second check while the cat is not on it: push the top of the post with 1 hand, hard enough to test a 10 kg load. A 90 cm post needs a base of at least 40 by 40 cm or a wall strap; a 120 cm tower needs 50 by 50 cm. Tighten the 4 base screws every 30 days, since sisal dust works them loose.

Cut any loose strand longer than 10 cm, because a swallowed 15 cm length of sisal is a linear foreign body and surgery runs $1,500 to $4,000. Skip posts glued with strong solvent adhesive near the scratching area, and keep the post 30 cm from curtains and cables. Seniors and cats with arthritis need the pad flat on a non-slip mat, with no jump higher than 20 cm to reach it.

What to buy this week

Measure the cat nose to tail base; buy 2 x that length, at least 90 cm.
Choose 8 mm sisal over carpet, and skip anything under 60 cm.
Put 1 post beside the nap spot and 1 pad at floor level.
Write the install date on the base; plan a re-wrap at day 90.
Rock-test the top with 10 kg of hand pressure every morning.

Terms mentioned in this article

Frequently asked

Why do cats prefer a post over a pad?

A vertical post lets the cat stand, reach and pull down through the front claws, which sheds the nail sheath and stretches the shoulder. A flat pad only allows a 20 to 30 cm horizontal drag. About 7 in 10 cats pick the vertical surface when both are offered at the same distance.

How tall should the post be for my cat?

Twice the body length, measured nose to tail base, and never under 60 cm. Most adults are 45 to 50 cm long, so 90 cm is the working height. Large breeds such as Maine Coons need 110 to 120 cm and a base of at least 50 by 50 cm.

How often do I replace the scratching surface?

Sisal rope lasts about 3 months of daily use by one cat, and corrugated pads last 6 to 8 weeks. Replace or re-wrap when half the surface is frayed flat or loose strands pull out by hand. A slick, worn post is the main reason cats go back to the sofa.