Julius-K9 harness sizing
Julius-K9’s IDC Powerharness chart lists chest girths from 29cm to 138cm across 9 sizes. Starts smaller than most, so it reaches dogs other brands cannot fit. It also runs further up than most, which matters for giant breeds.
The full chart
| Size | Chest girth | Weight guide | Buy |
|---|---|---|---|
| Baby 1 | 29–36 cm | 0.8–3 kg | Shop Baby 1 → |
| Baby 2 | 33–45 cm | 2–5 kg | Shop Baby 2 → |
| Mini-Mini | 40–53 cm | 4–7 kg | Shop Mini-Mini → |
| Mini | 49–67 cm | 7–15 kg | Shop Mini → |
| 0 | 58–76 cm | 14–25 kg | Shop 0 → |
| 1 | 63–85 cm | 23–30 kg | Shop 1 → |
| 2 | 71–96 cm | 28–40 kg | Shop 2 → |
| 3 | 82–115 cm | 40–70 kg | Shop 3 → |
| 4 | 96–138 cm | 70–90 kg | Shop 4 → |
Taken from Julius-K9’s own chart, checked 2026-08-19.
This chart is the IDC Powerharness. Julius-K9 make other harnesses, and a chart published for one is not automatically right for another — check the box before ordering a different model.
What Julius-K9 calls the same dog other brands would
Letter sizes do not travel between brands. For a chest measurement of 84cm, the finder recommends Julius-K9 2 using chest girth alone. Also covered by: 3, 1. The same measurement gives these chart results:
- Ruffwear — L
- PetSafe — Large; also covered by Medium/Large, Extra Large
- Kurgo — X-Large; also covered by Large
- Blue-9 — L; also covered by M/L
- Rabbitgoo — XL; also covered by L
- Puppia — above the published range. 84cm is above this range — the largest Puppia size stops at 80cm.
- PetSafe 3 in 1 — Large; also covered by Medium
- Dog Friendly Co — XL; also covered by L
- PawSafe — L; also covered by XL
- Wonder Walker — Large; also covered by X-Large
- Top Paw — Large; also covered by X-Large
These recommendations use chest girth alone. The size finder also considers published weight guidance when you supply weight. If you already know your dog’s Julius-K9 size and want it at every other brand, convert it directly — the tool opens on Julius-K9 and reads out every size that overlaps.
Where the size ranges meet
Julius-K9 has overlapping size bands. For example, Baby 1 and Baby 2 both cover 33–36cm. The finder recommends the most central match by chest girth and keeps the other covering sizes visible; published weight guidance can help choose when weight is supplied.
Some size pairs also share a single endpoint: 2 / 4 at 96cm. At each of these exact measurements, both named sizes cover the chest.
Near the bottom of a size’s range, the straps run close to their tightest; near the top there is little adjustment left. The size finder shows that position and every covering alternative.