Our high quality Herm Sprenger fur savers with toggle are perfect for every dog and every budget. How to size your dog for the fur saver: Please measure the width of your dog's neck and add 2 to 3 inches to determine an appropriate collar length. Fur saver size: 20 inch (50 cm) Fur saver size: 21 inch (54 cm) Fur saver size: 23 inch (58 cm) Fur saver size: 26 inch (66 cm)