Find My Dog's Size | K9 TailSaver Fit Guide
Find Your Dog’s Size
Our interactive size finder is temporarily unavailable. In the meantime, you're welcome to select your best size estimate and include your dog's breed, weight, and back length in the order notes — our team will personally review each order and hand-select the ideal fit for your dog
Next step after sizing
Once you have a size, move straight to the main set.
If your dog is between sizes, size up and text support before ordering. If you already know your fit, go directly to the K9 TailSaver product page.
How to Measure Your Dog
Approximate
Base of neck to base of tail (rump) - Is back 28" ( 71cm) ? Important ! Some Large dogs need to size up to XL based on this and some XL dogs need to size down to our "special" XL because of shorter back length.

📏 Get My Dog's Exact Size — Interactive Finder
Size by Breed
A quick starting point — use the tool above for your dog's exact measurements.
Akita — 20–38 lb S, 38–56 lb M, 56–95 lb L, 95+ lb XL (up-tails: guide tail in after gentle wrap with vet-wrap, which is pulled out of open end when setup is complete.)
American Staffordshire Terrier — 20–38 lb S, 38–58 lb M, 58–95 lb L, 95+ lb Custom
Anatolian Shepherd — 20–35 lb S, 35–60 lb M, 60–80 lb L, 80–90 lb L-Plus, 90–120 lb XL
Australian Shepherd / Cattle Dog — 20–38 lb S,38–60 lb M,60–90 lb L
Basset — 20–40 lb S, 40–58 lb M
Beagle — 20–40 lb S, 40–50 lb M
Beauceron — 20–38 lb S, 38–58 lb M, 58–100 lb L
Bernese Mountain Dog — 58–80 lb L, 80–98 lb L-Plus, 98–115 lb XL, 115–150 lb XXL
Border Collie — 40–55 lb M, 55–80 lb L
Boxer — 40–60 lb M, 60–100 lb L
Brittany Spaniel — 20–38 lb S, 38–58 lb M
Bulldog — 40–60 lb M, 60–95 lb L, 100+ lb Custom
Bullmastiff — 58–80 lb L, 80–90 lb L-Plus, 90–115 lb XL, 115–150 lb XXL
Cane Corso — 20–38 lb S, 38–58 lb M, 58–100 lb L
Caucasian Shepherd — 58–80 lb L, 80–90 lb L-Plus, 90–115 lb XL, 115–145 lb XXL, 145+ lb 3XL
Cocker Spaniel — 15–22 lb XS, 22–38 lb S, 38–58 lb M
Collie — 20–38 lb S, 38–58 lb M, 58–90 lb L
Dachshund — 15–20 lb XS, 20–38 lb S
Dalmatian — 20–38 lb S, 38–58 lb M
Dogue de Bordeaux — 38–55 lb M, 55–90 lb L, 90–115 lb XL, 115–160 lb XXL, 160+ lb 3XL
German Pointer — 38–55 lb M, 55–90 lb L, 100+ lb XL
German Shepherd — 35–65 lb M, 65–75 lb L, 75–85 lb L-Plus, 85–125 lb XL
Golden Retriever — 20–38 lb S, 38–58 lb M, 58–100 lb L, 100+ lb XL
Great Dane — 40–60 lb M, 60–90 lb L, 90–115 lb XL, 115+ lb XXL
Great Pyrenees — 58–80 lb L, 80–90 lb L-Plus, 90–115 lb XL, 115–150 lb XXL
Greyhound — 65–80 lb , 80–110 lb XL
Husky — 60–90 lb L (up-tails: guide tail in after gentle wrap of entire tail with vet-wrap, which is pulled out of open end when setup is complete.)
Irish Wolfhound — 80–95 lb XL, 95–115 lb XXL, 115–200 lb XXL Plus (3XL)
Labrador — 38–55 lb M, 55–90 lb L
Leonberger — 58–80 lb L, 80–90 lb L-Plus, 90–115 lb XL, 115–160 lb XXL, 160+ lb 3XL
Malinois — 38–55 lb M, 55–90 lb L, 100+ lb XL
Mastiff — 58–80 lb L, 80–90 lb L-Plus, 90–115 lb XL, 115–150 lb XXL
Mixed Breeds 1 — medium length/booty, 20–38 lb S, 38–58 lb M, 58–90 lb L, 100+ lb Custom
Mixed Breeds 2 — long/big rear, 20–38 lb S, 38–58 lb M, 58–90 lb L, 85+ lb L-Plus, 85+ lb XL
Mixed Breeds 3 — mixed with a giant breed, 40–60 lb M, 60–90 lb L, 90–140 lb XL/XXL
Newfoundland — 58–80 lb L, 80–98 lb L-Plus, 98–115 lb XL, 115–150 lb XXL, 150+ lb 3XL
Old English Sheepdog — 40–56 lb M, 56–90 lb L, 100+ lb XL**
Pharaoh Hound — 38–55 lb M, 55–90 lb L, 100+ lb XL
Pitbull — 20–38 lb S, 38–58 lb M, 58–95 lb L, 95–100 lb Custom
Poodle & Mixes — 20–38 lb S, 38–58 lb M, 58–95 lb L
Rottweiler — 38–58 lb M, 58–95 lb L, 95–115 lb XL, 115–160 lb XXL
Saint Bernard — 58–85 lb L, 85–90 lb L-Plus, 90–115 lb XL, 115–150 lb XXL
Scottish Deerhound — 85–105 lb XL, 105–125 lb XXL, 125+ lb 3XL
Shetland Sheepdog — 20–38 lb S, 38–58 lb M
Shiba Inu — 20–35 lb S, 35–55 lb M, 55–82 lb L-Plus, 82+ lb XL
Spaniel — 15–22 lb XS, 22–40 lb S, 40–58 lb M
Terrier — 20–38 lb S, 38–55 lb M, 55–90 lb L, 100–120 lb, XL, 120+ lb XXL
Tosa Inu — 95–115 lb XL, 115–160 lb XXL, 160+ lb 3XL
Whippet — 40–58 lb M, 58–85 lb L
Xoloitzcuintli — 38–55 lb M, 55–90 lb L, 90+ lb XL
Custom sizing: Include weight, breed and back length when ordering. We will customize order or call to modify if we have a question about fit.