DecorDogz Galore's Dog Collar Bandanas are custom-made and come in more than 300 patterns, the company reports. The bandanas are designed to slide easily over a collar, so no tying on a dog's neck, the company adds. They are offered in five sizes: x-large, 19 x 101/4 in.; large, 161/2 x 91/2 in.; medium, 123/4 x 73/4 in.; small, 91/2 x 53/4 in.; and mini, 63/4 x 43/4in.