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Julius-K9 IDC Powerharness size chart (in & cm)

Julius-K9 publishes 9 sizes for the IDC Powerharness, sized by chest girth. The chart runs from 11.5 to 54.5 in29 to 138 cm.

Source: Julius-K9 official size chart, checked Nov 4, 2026.

The full Julius-K9 IDC Powerharness chart

Exactly as Julius-K9 publishes it. Use the in / cm toggle at the top of the page.

Julius-K9 IDC Powerharness published size chart
SizeChest girthDog weightthe maker's guide, not a fitting
Baby111.5–14 in29–36 cm2–6.5 lb0.8–3 kg
Baby213–17.5 in33–45 cm4.5–11 lb2–5 kg
Mini-Mini15.5–20.5 in40–53 cm9–15.5 lb4–7 kg
Mini20–26.5 in49–67 cm15.5–33 lb7–15 kg
023–30 in58–76 cm31–55 lb14–25 kg
126–33.5 in63–85 cm50.5–66 lb23–30 kg
228–37.5 in71–96 cm61.5–88 lb28–40 kg
332.5–46.5 in82–115 cm88–154 lb40–70 kg
438–54.5 in96–138 cm154–198 lb70–90 kg

If your dog is between two sizes

Julius-K9 publishes no between-sizes guidance for the IDC Powerharness, so this site will not invent one. Between sizes. Check the maker’s chart before you buy.

This site treats a measurement within 1 in of the edge of a size, or inside two sizes at once, as between sizes, and shows both. Work it out with the harness calculator, or read how to measure your dog.

Popular breeds on the Julius-K9 IDC Powerharness chart

10 of the most popular breeds that have a published chest girth, mapped onto this chart. Only 57 of 127 breed records have a girth at all, so this is a sample, not a ranking. A breed range is a range: two dogs of the same breed can land in different sizes, so measure your dog.

Popular breeds and the Julius-K9 IDC Powerharness size their published girth falls in
BreedTypical chest girthSize on this chartHow it was worked out
French Bulldog20–26 in50.8–66 cmMini-Mini to 1 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Labrador Retriever28–36 in71.1–91.4 cm0 to 3 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Golden Retriever28–34 in71.1–86.4 cm0 to 3 (4 sizes)Measure your dog’s chest to pick one.by chest girth
German Shepherd Dog30–36 in76.2–91.4 cm0 to 3 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Dachshund (Standard)16–24 in40.6–61 cmBaby2 to 0 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Poodle (Standard)24–30 in61–76.2 cmMini to 2 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Beagle20–26 in50.8–66 cmMini-Mini to 1 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Rottweiler32–40 in81.3–101.6 cm1 to 4 (4 sizes)Measure your dog’s chest to pick one.by chest girth
Cavalier King Charles Spaniel18–22 in45.7–55.9 cmMini-Mini or Miniby chest girth
Yorkshire Terrier12–15 in30.5–38.1 cmBaby1 or Baby2by chest girth

Where a breed’s published girth reaches across three or more sizes, the first and last are shown with the count. This site will not pick one of them for you.

How to measure for this harness

Julius-K9 sizes this harness by chest girth.

Run a soft tape around the widest part of the rib cage, just behind the front legs, and keep it snug but not tight. Two fingers should slide under it. Measure twice: a tape that has slipped an inch is the single most common reason a size is wrong.

A number off this chart is where to start, not a fitting. Measure your dog and check Julius-K9’s own current chart before you buy.

Full guide: how to measure your dog

Julius-K9 IDC Powerharness

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Sizes here come from the maker’s own chart, not from any retailer.

Nearest harness charts

Charts that cover a similar range, if this one is too small or too large for your dog.

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