I'm helping a friend raise money to feed the homeless at her downtown church. We plan to host a Dog's Day in the Park, and to sell safety dog bandanas (triangular scarves with reflective edges).

Does anybody reading this know what size to make the bandanas? I visualize scarves in small (toy poodle) medium (corgi) and large (Labrador) sizes. Yorkies and Norwegian elkhounds would have to order specially. Perhaps your groomer puts a scarf on your dog. If so, what size is your dog and how many inches or centimeters long is the straight edge?

For the mathematically inclined, what length are sides A and B when C, the hypotenuse, goes around the dog's neck?

We are also going to have master/dog cakewalks with live music and dog treats for the prizes.