This cooling bandana are to big for my dogs. Al l4 are new never used. The diagonal length of the cooling bandana is 21”, and the side length is 15.5”. Suitable for most breeds of small and medium dogs. Made of cooling fabric, great material can absorb moisture and evaporate quickly, taking away heat from the dog’s neck, thereby lowering the dog's temperature and helping the dog to relieve the heat for several hours in the hot summer. Just soak the bandana in water, wring out the water and put it around the dog’s neck. And you can also put it in the refrigerator for a few minutes before wearing, this can get a stronger cooling effect. All my items come from a smoke free home. Any questions please feel free to contact me.