Back: Measure length of pet’s back from the base of the neck to the base of the tail. See below for estimating by breed.
Neck: Measure the circumference of pet’s neck for a snug fit. No need to add inches as you would with a collar.
Chest/Girth: Measure girth around the broadest part of the chest and add 2”.
Note: If the dog has a stout build, select one size larger.
Recommended sizing by breed:
XX-Small: Teacup and dogs under 5 lbs
X-Small: Australian Terrier, Chihuahua, Pomeranian, Toy Poodle, Yorkshire Terrier
Small: Boston Terrier, Jack Russell Terrier, Maltese, Pug, Silky Terrier
Medium: Bichon Frise, Beagle, Cocker Spaniel, Corgi, Scottish Terrier
Large: Brittany Spaniel, Bulldog, Collie, Schnauzer, Springer Spaniel
X-Large: Doberman Pinscher, German Shepherd, Golden Retriever, Labrador Retriever, Rottweiler
XX-Large: Irish Wolfhound, Great Dane, Mastiff, Newfoundland, St. Bernard
Size
XX-Small
LENGTH--to 6" NECK--8"-10" CHEST--12"-14"
X-Small
LENGTH--6"-8" NECK--10"-12" CHEST--14"-18"
Small
LENGTH--8"-12" NECK--12"-16" CHEST--18"-22"
Medium
LENGTH--12"-16" NECK--16"-20" CHEST--22"-28"
Large
LENGTH--16"-20" NECK--20"-22" CHEST--26"-32"
X-Large
LENGTH--20"-24" NECK--22"-24" CHEST--30"-36"
A Dog's Age in Human Years |
| Age |
Up to 20 lbs |
21-50 lbs |
51-90 lbs |
Over 90 lbs |
| 5 |
36 |
37 |
40 |
42 |
| 6 |
40 |
42 |
45 |
49 |
| 7 |
44 |
47 |
50 |
56 |
| 8 |
48 |
51 |
55 |
64 |
| 9 |
52 |
56 |
61 |
71 |
| 10 |
56 |
60 |
66 |
78 |
| 11 |
60 |
65 |
72 |
86 |
| 12 |
64 |
69 |
77 |
93 |
| 13 |
68 |
74 |
82 |
101 |
| 14 |
72 |
78 |
88 |
108 |
| 15 |
76 |
83 |
93 |
115 |
| 16 |
80 |
87 |
99 |
123 |
| 17 |
84 |
92 |
104 |
Purple
numbers =
Senior
Red
numbers =
Geriatric |
| 18 |
88 |
96 |
109 |
| 19 |
92 |
101 |
115 |
| 20 |
96 |
105 |
120 |
Chart developed by Dr. Fred L. Metzger, DVM, State College, PA.
Courtesy of Pfizer Animal Health. |
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