Julius-K9
IDC Powerharness
1
central fitComfortably inside the 1 range, with adjustment room either way. 3 Julius-K9 sizes cover 72cm; 1 is the most central.
also fits20
Dog gear has no shoe size. So we made one.
Every brand publishes its own chart and stops there, so “my dog is a Medium” means nothing the moment you switch. One chest measurement becomes your dog’s FurPick number — the size that translates across every brand, for life.
Your dog’s number
FURPICK 72
Chest 72 cm (28.3 in) · 30 kg — one measurement, read at every brand below.
Julius-K9 1Ruffwear MPetSafe LargeKurgo LargeBlue-9 M/LRabbitgoo XLPuppia XL
7 brands, one dog
Ruffwear
Harness (girth sizing)
M
central fitComfortably inside the M range, with adjustment room either way.
PetSafe
Easy Walk Harness
Large
snugNear the bottom of the Large range — it will fit, but with the straps close to their tightest. A growing dog will be fine; a fully grown one may prefer the size down if there is one. 3 PetSafe sizes cover 72cm; Large is the most central.
also fitsMedium/LargeMedium
Kurgo
Tru-Fit Smart Harness
Large
central fitComfortably inside the Large range, with adjustment room either way. 2 Kurgo sizes cover 72cm; Large is the most central.
also fitsX-Large
Blue-9
Balance Harness
M/L
central fitComfortably inside the M/L range, with adjustment room either way. 2 Blue-9 sizes cover 72cm; M/L is the most central.
also fitsM
Rabbitgoo
ControlPro No-Pull Harness
XL
central fitComfortably inside the XL range, with adjustment room either way. 2 Rabbitgoo sizes cover 72cm; XL is the most central.
also fitsL
Puppia
RiteFit Harness
XL
central fitComfortably inside the XL range, with adjustment room either way. 2 Puppia sizes cover 72cm; XL is the most central.
also fitsL
Already own one of these? Charts say how a harness is meant to fit. Owners know how it actually did. Tell us, and this page starts answering that too.
Before you order — the two-finger rule
- Measure the deepest part of the ribcage, just behind the front legs, with the dog standing.
- Two fingers should slide flat under any strap. A whole hand means it is loose enough to reverse out of.
- Snug against the coat, not pulled tight through it — and re-check after a groom.
Ranges are transcribed from each manufacturer’s own chart. See the full conversion chart or how we check these numbers.
How the number works
Step 1
Measure once
The deepest part of the ribcage, just behind the front legs. That single number is what every brand sizes by.
Step 2
Get your number
Your dog’s girth in centimetres, which is the only figure that means the same thing at every manufacturer.
Step 3
Read it anywhere
Julius-K9, Ruffwear, PetSafe, Kurgo and Blue-9 — 43 sizes, all transcribed from their own charts.
The conversion nobody else publishes
A Julius-K9 “1” is a Ruffwear “M”. Every brand’s sizes, lined up against each other on one scale, so you can see exactly where they disagree — including the sizes with no clean equivalent anywhere else.
See the full chartOther ways in
Start from your breed
60 breeds, sized from each manufacturer’s own chart — for when you have not got a tape to hand.
Browse the brand charts
7 brands, 43 sizes, each with the page it came from and the date it was checked.
How we check the numbers
What we source, what we refuse to guess, and why two brands are deliberately left blank.
From the magazine see all
Harness size ranges overlap because printed measurements represent strap adjustability limits rather than rigid dog size tiers.
14 September 2026 · 4 min
Learn how harness size boundaries vary between manufacturers and how to select a brand where your dog sits centrally within the measurement range.
13 September 2026 · 5 min
Chest girth, not weight, is the defining measurement when fitting a harness to deep-chested breeds like Greyhounds, Dobermans, and Dachshunds.
11 September 2026 · 5 min
A harness that does not fit is a harness a dog can back out of. If your measurement lands on the edge of a range, take the size that leaves adjustment in hand rather than the one that only just closes. Julius-K9 · Ruffwear · PetSafe · Kurgo · Blue-9 · Rabbitgoo · Puppia