Yes, it doesn't fit under doors but it still works in any other kind of space - especially if you have enough space under a book case.

Does not fit under any door!! Managed to force it under a door (taking paint off the door!) where I had a very large gap (a good inch), but the door doesn't move with it on. Surprised Pets at Home sell this

Dont fit under the door what a waste of time my cat doesn't even like the cat nip

Doesn't fit under any doors!

A complete waste of money, doesn't fit under any of my doors, my two cats are not interested in it,the catnip doesn't even smell. Will be taking it back for a refund.

My long-haired cat Alfie loves to rub his head against his brush - he gets positively ecstatic , so this seemed the ideal treat for him. But it doesn't "fit all doors" by any stretch of the imagination. I managed to get it to fit under one by forcing it and scratching the paintwork, but I might as well not have bothered - Alfie resolutely refused to have anything to do with it. After a couple of weeks' trial I took it back to Pets at Home, who, despite the fact that I'd lost both the recipe and the packet of catmint, took it back without question. So top marks for Pets at Home but definitely not for this pointless product.