I use it for our little Staffordshire bull terrier and it is the right size for a dog his size (about 44#s), The regular Kong flyer is a little to big for him. I have tried about 10 different brands/types of flyers and this one is the best for him. It last about 2-3 weeks if he don't rip it to early, if not it'll last 1-2 weeks which seems short but the other types usually last only a few days.
Mini Schnauzer likes this but it's a little too heavy to fly very far. He likes chewing on it though & I like that he can't damage it. Wish the rubber was more light weight but the small size is great for a small dog. Many flyers are too big.