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 10.25 in.; large, 16.5 x 9.5 in.; medium, 12.75 x 7.75 in.: small, 9.5 x 5.75-in.; and mini, 6.75 x 4.75 in.