Bandanas are made in three different versions, over the collar, tie-on or snap-on. Please view our sizing chart before purchasing to determine which size would be best for your pooch! • Measure your pet’s collar for reference. Depending on how loosely you want the bandana to fit, you'll want to add about an inch to this measurement. • Select the bandana size that corresponds with your pet’s measurement. • If your pet is between sizes, we recommend sizing up. • If you're unable to find your pet’s size, send us a message and we would be happy to create a custom order just for you!