K9 Forge Sizing Guides

Getting the right fit is critical for your dog's comfort, safety, and performance. Use our sizing guides below to find the correct size for every piece of K9 Forge tactical gear.

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How to Measure Your Dog

Before selecting a size, take three key measurements with a soft tape measure:

• Chest Girth: Measure around the widest part of your dog's chest, just behind the front legs. Add 2 inches for comfort.
• Neck Circumference: Measure around the base of the neck where a collar would sit. Add 1–2 inches for fit.
• Back Length: Measure from the base of the neck to the base of the tail along the spine.

Tip: Always measure your dog, not their current collar or harness. Sizes vary by product and breed.

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Tactical Harness Sizing

Size	Chest Girth	Recommended Breeds	Weight Range
M	22–28 in (56–71 cm)	Medium working breeds	40–60 lbs
L	28–34 in (71–86 cm)	German Shepherd, Belgian Malinois, Labrador	60–80 lbs
XL	34–40 in (86–102 cm)	Rottweiler, Cane Corso, Dutch Shepherd	80–110 lbs
XXL	40–48 in (102–122 cm)	Giant breeds, heavily muscled dogs	110+ lbs

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Tactical Collar Sizing

Size	Neck Circumference	Collar Width
M	14–18 in (36–46 cm)	1.5 in (38 mm)
L	18–22 in (46–56 cm)	1.5 in (38 mm)
XL	22–26 in (56–66 cm)	2 in (50 mm)

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Breed-Specific Sizing Reference

• German Shepherd: Typically L harness, L collar. Chest 28–34 in, neck 18–22 in.
• Belgian Malinois: Typically M–L harness, M–L collar. Leaner build — measure carefully.
• Rottweiler: Typically XL harness, XL collar. Broad chest and thick neck.
• Dutch Shepherd: Typically L harness, L collar. Similar to GSD build.
• Cane Corso: Typically XL–XXL harness, XL collar.
• Doberman: Typically L harness, L collar. Deep chest, narrow waist — size by chest girth.

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Still Not Sure?

Email our gear concierge at k9forgepets@gmail.com with your dog's measurements and breed, and we'll recommend the right size before you order.