Adjustable up to 8.5″. Choices include Chihuahua, Beagle, Boston Terrier, Boxer, Bulldog, Dachshund, German Shepherd, Golden Retriever, Jack Russell, Lab, Pug, Schnauzer, Shih-Tsu, Westie, and Yorkie.
I am afraid to try purching this because I entered the code but when it shows me the shipping options, it does not show any that are Free.
Their site is a little confusing. The code works. You will see free shipping reflected in the order summary on the last page of checkout. Ignore the other pricing you see along the way.