<b>MATERIAL & FEATURES:</b><br>1.The E-collars are special and comfortable, help your pets to better complete the recovery process after illness. They are made of high quality cotton which is breathable and comfortable, your pets will feel good with these cones. Wish your pets can recover faster and easier.<br><b>2.Size(basically for small, medium-sized dogs, cats, rabbits between 4-38 pounds):<br> S (under-size, for young kitten and rabbits):7.87-9.05’’×4.92’’(20-23cm×12.5cm); <br>M (under-size, for cats and tiny dogs):9.44-10.62’’×5.70’’(24-27cm×14.5cm); <br>L (under-size, for cats and small dogs):11.02-12.20’’×6.10’’(28-31cm×15.5cm); <br>XL (under-size, for small and medium dogs):12.59-14.17’’×7.08’’(32-36cm×18cm);<br>XXL (under-size, for medium dogs):14.57-16.14’’×8.26’’(37-41cm×21cm)<br>3.Please do not make your choice only according to the size name, measure the circumference of your pet's neck to make sure the collar fits your pet, for the pets with bigger head, we suggest you to choose one size bigger. If you are hesitating between the two sizes, we suggest you to choose the bigger one.<br> NOTES: </b><br>The color of actual items may slightly vary from the online images due to different computer screens. <br>The size is measured by hand, there is a slight manual error, but it does not affect the usage.<br><b>SERVICE GUARANTEE:</b><br>Your satisfaction is our goal of service. If you have any question about the product, please be free to contact us, we will try our best to resolve all the problems for you as far as we can.If you are satisfied with our service and product, please give us the positive feedback. We would appreciate that very much. <br>