| Size | Fits Neck | Example Breeds |
|---|---|---|
| XS | 8–11 in (20–28 cm) | Chihuahuas, Toy Yorkies, Papillons, Cats, and other toy breeds |
| S | 11–14 in (28–35 cm) | Shih Tzus, Pugs, Cavaliers, Mini Poodles, Jack Russells, French Bulldogs |
| M | 14–17 in (35–43 cm) | Border Collies, Springer Spaniels, Medium Doodles, Cattle Dogs, Large Corgis |
| L | 17–20 in (43–50 cm) | Shepherds, Large Labradors, Golden Retrievers, Ridgebacks, Rottweilers, American Bulldogs |
| XL | 20–24 in (50–60 cm) | Malamutes, St. Bernards, Great Pyrenees, Great Danes, Mastiffs, Newfoundlands |
| XXL | 24–28 in (60–71 cm) | Bull Mastiffs, Leonbergers, Wolfhounds, other giant breeds |
