All Sales Final.  Halti head collar is a great collar used to put around the head of the dog rather than the neck.  
Recommended :
Size 0 for Miniature Dachsund, Papillon, Toy Poodle, Yorki.
Size 1 for Border Terrier, Jack Russell, Cairn Terrier, Welsh Corgi, Standard Dachsund, Shelti, Westie, Whippet.
Size 2 for Beagle, Border Collie, Cockers, Saluki, Schnauzer, Standard Poodle, Basenji, Welsh Terrier
Size 3 for Afghan, Airedale, Boxer, Briard, Chow Chow, Dalmation, Doberman Greyhound, German Shepherd, Husky, Lab, Pointer, Retreivers, Setters, Springers, Weimaraner.