Holster Girth Extender

Don't Replace. Extend.

Cat gained winter weight? Puppy growing fast? Pet between sizes? The Holster Girth Extender adds 1-4 inches to your existing Kitty Holster, Doggy Holster, or Bunny Holster—extending the life of your harness and saving you from buying a whole new size. Handmade in the USA with the same quality materials.

Invented by a scientist, tested by rescues. As featured in Women's Insider.

• Adds 1-4 Inches for a Perfect Fit: Whether your pet gained a few pounds, is recovering from surgery, or is still growing, the Girth Extender lets you adjust the fit without replacing the entire harness. Works with all Holster harness models.
• Cost-Effective & Eco-Friendly: Keep the harness you already have instead of buying a new size. Better for your wallet and the planet—reduce waste while maintaining the same trusted comfort and security.
• Same Premium Quality: Handmade in the USA with the same high-quality materials, soft cotton muslin lining, and secure Velcro closures as our award-winning harnesses. Available in 2 sizes to fit all Holster products.
• Support Rescue Animals: Every purchase helps fund our Texas animal sanctuary, where we care for 200+ rescued animals. Part of the Complete Pet Harness collection trusted by 50,000+ pet owners.

Handmade in the USA | Fits All Holster Harnesses | Available in 2 Sizes

Why Pet Owners Love the Girth Extender

• Adds 1-4 inches of adjustable girth for unrestricted movement
• Extends harness life - accommodates weight changes and growth
• Achieves perfect fit between harness sizes
• Made from same durable materials as Crazy K Farm harnesses
• Quick-attach design - attaches and removes in seconds
• Cost-effective alternative to buying new harness

Quality and Compatibility Features

• Two size options: Small and Large
• Small fits XS and S/M Holster harnesses
• Large fits M/L and XL Holster harnesses
• Compatible with Kitty Holster, Doggy Holster, and Bunny Holster
• Hook-and-loop closures for secure attachment
• Durable construction for long-lasting performance
• Machine washable for easy care
• Handmade in USA with premium materials

Which Pets and Situations Benefit Most

• Growing kittens, puppies, or bunnies outgrowing current harness
• Pets with seasonal weight fluctuations
• Pets between harness sizes needing custom fit
• Extending the life of existing harnesses during growth phases
• Senior pets with changing body shapes
• Pets recovering from illness with weight changes
• Multi-pet households sharing harnesses

How to Choose Your Extender Size

Small Girth Extender:

• Fits: XS and S/M Holster harnesses
• Best for: Cats, small dogs, and small rabbits
• Use with: Kitty Holster XS/S/M, Doggy Holster XS/S/M, Bunny Holster Small/Medium

Large Girth Extender:

• Fits: M/L and XL Holster harnesses
• Best for: Larger cats, small-medium dogs, and larger rabbits
• Use with: Kitty Holster M/L, Doggy Holster M/L/XL, Bunny Holster Large

When to Use a Girth Extender

• Growing pets: Your kitten, puppy, or bunny is growing but harness still fits with extension
• Weight gain: Seasonal weight changes or recovery from illness
• Between sizes: Current harness is snug but next size up is too large
• Extend harness life: Get more use from existing harness during growth phase
• Comfort adjustment: Need slightly more room for comfortable fit

How to Use Your Holster Girth Extender

1. Remove harness: Take harness off your pet
2. Attach extender: Connect girth extender to harness using hook-and-loop closures
3. Adjust fit: Position extender for optimal comfort and fit
4. Test fit: Place harness on pet and adjust for snug but comfortable fit
5. Check movement: Ensure pet can move freely without harness shifting

Fitting Tips:

• Extender adds 1-4 inches depending on adjustment
• Harness should fit snugly but not restrict breathing
• Check fit regularly as pet continues to grow
• When extender is fully extended, consider sizing up harness

How to Care for Your Girth Extender

• Washing: Machine wash cold with harness, air dry recommended
• Inspection: Check hook-and-loop closures regularly for wear
• Storage: Store attached to harness or separately in dry place
• Replacement: Replace if closures lose grip or fabric shows significant wear

About Our USA Handmade Quality

Each Holster Girth Extender is meticulously handcrafted in the USA with the same premium materials used in our award-winning Kitty Holster, Doggy Holster, and Bunny Holster harnesses. Designed to seamlessly integrate with our Complete Pet Harness collection trusted by 50,000+ pet owners worldwide.

Every purchase supports our Texas animal sanctuary caring for 200+ rescued animals including cats, dogs, rabbits, chickens, ducks, and geese.

Learn about our sanctuary and mission →

Complete Your Pet Harness Collection

Get the most from your Holster harness with these companion products:

• Kitty Holster Cat Harness - #1 rated escape-proof cat harness
• Doggy Holster Small Dog Harness - Escape-proof vest for small dogs
• Bunny Holster Rabbit Harness - Safe rabbit walking harness
• Holster Leash - Matching USA-made leash

Extend the life of your harness and ensure perfect fit! Order your Holster Girth Extender today and keep your pet comfortable as they grow!