I purchased this before and used it once, but my dog's paws were too big to fit. I'm selling it to someone else. The diameter of the paw entry is about 6cm. Recommended for extra-small to small dogs, and also for well-behaved cats. ● Semi-automatic paw washer for easy cleaning of pet paws A perfect item after walks or outings. ● Semi-automatic, with a button to rotate the cup, making it easy to wash with one hand ◎ ● Can be disassembled and the cup and brush parts can be washed, keeping it clean at all times. 《How to Use》 Please see the product details image. How about it for dogs on walks or cats who don't like baths ᐠ( ᐛ )ᐟ ※ No outer box or instruction manual.