I’m looking to put a mat for our dog kennels. Is this safe for dogs of all sizes to stand on?

Yes! These tiles are safe for dogs of any size. However, since these tiles do not have an even surface, and your dogs may find them difficult to walk on. We'd recommend using tiles that have an even surface, making it easier on the dog's paws. Our ProFlow Drainage Tiles or any of our other flat surface grip-loc tiles would be a better option.