A 4cm pad is fine for a 3kg cat and gives way under a 7kg one. Once the board compresses the surface stops shredding and the cat loses interest. Depth is what keeps a scratcher working for a heavy cat, and this one has 13cm of it.

Corrugate works because the cut edges of the flutes catch a claw. The trade is debris, and a big cat scratching hard produces more of it than a small one. That is the surface doing its job, not a fault. Sit it on a hard floor rather than a rug and clearing up takes seconds. Once the board is spent the whole lounge is recyclable.

32cm across, against 20cm on a standard cardboard lounge. That width is the difference between a cat perching on a scratcher and lying along it, and a cat that lies on it uses it far more often. 48cm of length suits an average adult. If your cat is unusually long, the cat scratchers range has 59cm options.

Corrugate works because the cut edges of the flutes catch a claw. The trade is debris, and a big cat scratching hard produces more of it than a small one. That is the surface doing its job, not a fault. Site it on hard floor rather than a rug and clearing up takes seconds. Once the board is spent the whole lounge is recyclable.

Measure your cat lying down, then add a little. An average adult needs about 45cm of length and 25cm of width. A Maine Coon needs nearer 60cm, and so do the bigger Ragdolls. This one is 48 by 32cm, which covers most adults and the broader end of the range.

Do big cats need a bigger scratcher? Wider and thicker, more than longer, is the honest answer. Weight is the factor people miss: a heavy cat compresses a thin pad until it stops working, whichever way up it sits.

The best cat scratcher for large cats is the one that keeps its shape. Depth of board matters more than brand, and anything under about 8cm compresses under a heavy cat.

How much space does a cat need to stretch when scratching? A horizontal stretch runs roughly the length of the cat from nose to base of tail. Cats cut the stretch short rather than hang off the end, which is why an undersized pad gets abandoned.

Debris scales with the size of the cat. A 7kg cat working a thick pad produces noticeably more shredding than a small cat on a thin one, which catches people out when they upgrade.

Is cardboard good for cat scratchers? For horizontal scratching, it is the surface most cats choose. It yields where sisal resists, which is why the two surfaces suit different habits instead of competing.

A heavy duty cat scratcher means thicker board and a denser flute, not a tougher coating. Coatings stop the shredding that cats are after in the first place.