Dog Lift Harness Size Chart: Measure Once, Fit 3 to 66 lb
Most size charts give you a letter and a weight range. For a lifting harness that is not enough.
A lift harness has to sit on bone, not on the soft part of the belly, and it has to hold its panels in place while you take part of your dog's weight. So this page gives you the weight bands the store actually stocks, plus the two things a range cannot tell you: where to put the tape, and what to do when your dog lands between two lines.
You need a soft tape measure and a scale. Five minutes is enough, and you only have to do it twice a year.
The chart: five weight bands, XS to XL
Every harness on this page is sized by body weight, in five bands from 3β66 lb (1.5β30 kg). The last column tells you which designs are made in each band.
| Size | Dog weight (lb) | Dog weight (kg) | Which harness |
|---|---|---|---|
| XS | 3β8 | 1.5β3.5 | Full-body β Β· Rear β Β· Strap β |
| S | 9β17 | 4β7.5 | Full-body β Β· Rear β Β· Strap β |
| M | 18β30 | 8β13.5 | Full-body β Β· Rear β Β· Strap β |
| L | 31β44 | 14β20 | Full-body β Β· Rear β Β· Strap β |
| XL | 45β66 | 20.5β30 | Full-body β Β· Rear β Β· Strap β |
The full-body harness runs the whole ladder, XS to XL, and supports chest, belly and hips. The rear-support harness starts at S (9 lb / 4 kg) and supports the hind end only. Both harnesses ship with one matching assist strap in the box; the $9.90 item on the product page is the strap sold on its own β an extra, a replacement, or a different colour β with its own XSβXL sizing, and it does not include a harness.
What we publish, and what you measure yourself
We publish the weight band for each size, because a weight band is a hard number that every scale agrees on.
We do not publish a chest girth range per size. That range has not been measured and signed off, and a number invented for this page would be worse than no number, because it would send some dogs home in a harness that does not fit. The weight band picks your size, and your own tape confirms the panels will sit where they should. Step 3 shows you exactly where to put it.
If your dog is much deeper-chested or longer-bodied than average for its weight, take the larger of the two candidate sizes, and send the numbers through the contact page if two sizes still look plausible.
Why the weight band comes first, not the letter
A letter size means nothing across brands. One brand's L fits a 30 lb (13.6 kg) dog; another brand's L fits a 55 lb (24.9 kg) dog. Your dog's weight is the only value that travels between brands.
Two hard limits sit inside this chart. The smallest full-body band is 3 lb (1.5 kg), and both harnesses stop at 66 lb (30 kg). A 70 lb (31.8 kg) dog has no size on this page β that is a design limit, not a fitting problem.
The bands are also written in whole pounds, which leaves a gap between 8 lb and 9 lb. An 8.5 lb (3.9 kg) dog sits between XS and S, and the rear-support harness starts at 9 lb (4 kg), so that dog can wear the full-body design in S but not the rear design.
Three steps to the right size
Work through these in order. Do not skip step 1, because the two designs size differently at the bottom of the range.
Step 1: Confirm which harness design your dog needs
The full-body harness covers 3β66 lb (1.5β30 kg) in XSβXL and supports chest, belly and hips. The rear-support harness covers 9β66 lb (4β30 kg) in SβXL and supports the hind end only. If your dog cannot push up in front without a hand under the chest, the design you need is the full-body one, and the smallest size applies.
Step 2: Weigh the dog, then read the band
Stand on a home scale holding your dog, then weigh yourself alone and subtract. For a large dog, use the scale at your vet's office. Write the number down to the nearest half pound.
Weight moves by a pound or so with a full stomach or a long drink, so weigh at the same time of day you would measure. If the number lands within 1 lb (0.45 kg) of a band edge, treat it as a boundary case and read the next section.
Step 3: Measure the chest girth, snug and level
Put the tape behind the front legs, at the widest part of the rib cage, and keep it level all the way around. The tape should sit snug against the body without sinking into it. Have your dog stand on a flat floor, not sit.
Record the number in inches and in centimetres, and take it twice. Steady pressure matters more than the exact spot, because a loose tape reads one size large and a tight tape reads one size small. The step-by-step measuring guide covers the other three measurements β chest, hips, back and belly β if you want the full set.
Between two sizes? Size up
The rule on this store is simple: when your dog falls between two sizes, choose the larger one. A strap can always be shortened; a panel cannot be made longer.
| Situation | What to order | Why |
|---|---|---|
| Weight sits mid-band and the girth is mid-range | That size | Nothing is arguing for either neighbour |
| Weight sits mid-band, girth reads near the top | One size up | Panels must overlap the belly, and a tight panel rides up |
| Weight on a band edge (8 lb vs 9 lb) | The larger band | Bands are whole pounds; 8.5 lb (3.9 kg) belongs to S |
| Weighing in kilograms, close to a band edge | One size up | Labels round to the nearest half kilo: 8 lb prints as 3.5 kg, though 8 lb is 3.63 kg |
| Over 66 lb (30 kg) | No size on this page | Both designs stop at 66 lb (30 kg) |
Kilograms and centimetres are rounded, so a conversion will never be exact. Use this table to keep your notes in both units:
| Pounds | Kilograms | Inches | Centimetres |
|---|---|---|---|
| 8 | 3.6 | 20 | 50.8 |
| 9 | 4.1 | 22 | 55.9 |
| 17 | 7.7 | 24 | 61.0 |
| 18 | 8.2 | 26 | 66.0 |
| 30 | 13.6 | 28 | 71.1 |
| 44 | 20.0 | 30 | 76.2 |
| 66 | 29.9 | 34 | 86.4 |
Both conversions use 1 lb = 0.4536 kg and 1 in = 2.54 cm. That is why 66 lb converts to 29.94 kg while the label reads 30 kg, and why 8 lb converts to 3.6 kg while the label reads 3.5 kg. The store rounds to the nearest half kilo, so trust your dog's pound weight when a band edge is close.
Five measuring mistakes that change the size
Each of these turns a correct size into a return. They are listed in the order they usually happen.
1. Measuring on the coat instead of through it. A thick winter coat adds 1β2 in (2.5β5 cm) to the chest. Part the coat and lay the tape on the skin, then add no more than one finger of room.
2. Measuring a sitting dog. A sitting dog compresses the chest and shortens the body. Measure standing, on level ground, with the head forward.
3. Measuring the chest once and skipping the belly. A deep-chested, narrow-waisted dog can pass on chest girth and still slip a rear panel forward. Take the belly and hip numbers too, and use the loosest one.
4. Pulling the tape tight to "be safe". Tight tape reads small, so the harness arrives too small. Snug, level, and readable is the goal.
5. Measuring once, months ago. Muscle loss in a senior dog is gradual, and a 3 lb (1.4 kg) drop can cross a band edge. Re-measure before a second order; the Merck Veterinary Manual's dog owner section is a plain-language reference for body condition, and the VCA's pet health library covers what changes with age.
Frequently asked questions
My dog weighs 8.5 lb (3.9 kg). Which size? Order S in the full-body harness. XS tops out at 8 lb (3.6 kg), and the rear-support harness starts at 9 lb (4 kg), so S is the only fit you have.
Is a scale enough, or do I need the tape? For most dogs the weight band picks the size. The tape confirms the panels will sit where they should, and it matters near a boundary or with a deep-chested dog.
My dog is 70 lb (31.8 kg). Is there a size for that? No. Both designs stop at 66 lb (30 kg). A sling or a different product will serve that dog better, and the brand facts page lists what the store does carry.
Can I use this chart for another brand? No. Only the weight bands are portable. Letters and girth ranges differ, which is why the AKC's health library and your vet's scale are better references than a glance at a tag.
What this article is not. This is not veterinary advice or a diagnosis. Weight loss, weakness, or a sudden change in how your dog stands should be checked by your veterinarian; a harness makes daily movement easier and does not treat a condition. Girth ranges are not published on this page, so treat your own measurements as a starting point and confirm the size with the store before a first order.