These Bandanas go over the collar and won't slip off! They also feature 2 different designs, so you can switch it up! What is pictured is what you'll receive. The large size goes 9-10 inches around the collar and hangs 7-8 inches low. The collar hole size is 1.75 inches big. The small size goes 5.5-6.5 inches around the collar and hangs 5 inches low. The collar hole size is 1 inches big.