Scratching is not destruction. It is stretching, scent-marking and shedding the outer sheath of the claw, usually in one place, usually at the same time of day. A scratcher that lets a cat do all three without sliding across the floor will be used.
Vertical posts suit cats that stretch upward, which is most of them. Horizontal pads suit cats that prefer to dig while crouched, and older cats often choose them. Angled boards split the difference and are the easiest to place in a small room.
The practical answer for a private-label range is usually two of the three: one tall vertical piece and one flat pad, so a household with more than one cat has options.
A vertical scratcher needs to be tall enough for a full stretch — roughly the length of the cat from nose to tail base — and heavy or wide enough at the base that it does not tip. If a cat has to hold back, it will find the sofa instead.
This is where corrugated board helps: a wide base can be built into the same piece without adding a separate plinth, and the weight sits low where it is needed.
Too soft and the board shreds in a week. Too hard and the claws skate off. The useful middle is a dense board that gives slightly under pressure, with a clean cut edge so the surface does not crumble.
Two cats will use two scratching places, often in different rooms. A modular system — one core, several shapes — lets a retailer sell a starter piece and an add-on without a new tooling cycle.