Dog Car Seat Size Guide (2026)
How to Choose the Right Size (M, L & XL)
Choosing the right dog car seat size is essential for your dog’s safety, comfort, and relaxation during travel. A seat that is too small can feel restrictive, while a seat that is too large may reduce stability.
This guide helps you choose between Medium (M), Large (L), and Extra Large (XL) based on weight, length, and behavior.
The Quick Answer
Medium (M)
• Up to 10 kg (22 lbs)
• Up to 45 cm (18 inches) body length
Large (L)
• Up to 20 kg (44 lbs)
• Up to 60 cm (24 inches) body length
Extra Large (XL)
• Larger than 20 kg (44 lbs)
• Larger than 60 cm (24 inches) body length
In doubt between sizes? Choose the larger size for more comfort, especially for longer trips.
How to Measure Your Dog
1. Check the Weight
Your dog’s weight is the primary guideline. Always stay within the recommended range.
2. Measure the Length
Measure from the base of the neck to the start of the tail.
This determines whether your dog can lie down comfortably inside the seat.
3. Consider Behavior
• Active or anxious dogs → choose a larger size
• Calm dogs who like to curl up → a snug fit works well
Medium Dog Car Seat (M)
Best For:
Dogs up to 10 kg (22 lbs) who prefer a secure and cozy fit.
Ideal If Your Dog:
• Has a body length up to 45 cm (18 inches)
• Enjoys a compact, supportive space
• Travels frequently
Common Breeds:
• French Bulldog (small)
• Pug
• Chihuahua
• Yorkshire Terrier
• Pomeranian
• Shih Tzu
• Maltese
View the Medium Dog Car Seat
Large Dog Car Seat
(L)
Best For:
Dogs up to 20 kg (44 lbs) who need more space to sit or lie down comfortably.
Ideal If Your Dog:
• Has a body length up to 60 cm (24 inches)
• Falls between small and medium sizes
• Prefers more room or moves during travel
Common Breeds:
• Cockapoo
• Beagle
• Shiba Inu
• Cocker Spaniel
• Cavapoo (larger)
• French Bulldog (large)
• Mini Labradoodle
View the Large Dog Car Seat
Extra Large Dog Car Seat (XL)
Best For:
Dogs larger than 20 kg (44 lbs) who need maximum comfort and space.
Ideal If Your Dog:
• Has a body length larger than 60 cm (24 inches)
• Likes to stretch out
• Goes on longer journeys
Common Breeds:
• Labrador Retriever
• Golden Retriever
• Standard Labradoodle
• Australian Shepherd
• Siberian Husky
• Dalmatian
• Boxer
View the XL Dog Car Seat
Between Two Sizes?
If your dog is exactly between sizes:
Choose the larger size if:
• Your dog is close to the weight limit
• Your dog is active or restless
• You travel long distances
Choose the smaller size if:
• Your dog prefers a snug, secure feeling
• Your dog has a compact build
• The available space in your car is limited
Why Choosing the Right Size Matters
A properly sized dog car seat:
• Increases safety during braking
• Reduces movement and instability
• Helps prevent anxiety and car sickness
• Allows your dog to fully relax
The correct size directly improves your dog’s travel experience.
Still not sure?
Please contact us for personal size advice — we’re happy to help you find the perfect fit for your dog.