[Size: 5# Neck Circumference: 8.6-10.2 in Depth: 4.5 in 6# Neck Circumference: 7.0-8.3 in Depth: 3.9 in 7#Neck circumference: 5.6-6.9 in Depth:3.3 in 3pcs Pet E-Collar: 3 different sizes in each set. Perfect for different age or size pets. Meet your different needs and no trouble for choosing. Convenient to Use: The Velcro design makes it easy to tighten or loosen. A large area of Velcro can make the neck cover difficult to break free. And the size of the neck circumference can be adjusted in a certain range. Besides the soft fabric edge makes the kitten cone breathable and comfortable. Multiple Usage Scenarios: The cone collar applied around pet's neck to make it difficult to lick itself bite or scratch your hands when taking a bath trimming the nails and other grooming occasions. It is great for your pet's recovery from surgical operation or injury. Considerations: Most pets will take some time to get used to this Elizabethan collar cone. If your pet has difficulty eating or drinking while wearing it you should wait until your pets has finished eating. Note: Please check the size before purchasing. Please contact me if you have any questions]