The right horse rug size is the straight-line tape measurement from the centre of the chest, around the widest part of the shoulder, along the side, to the centre of the tail, in feet and inches. Most Australian horses fall between 5’9 and 6’6; ponies and minis sit between 3’0 and 4’9; warmbloods and big thoroughbreds push 6’9 to 7’0. Get the measurement right and the rug stays put. Get it wrong and you’ll spend the winter chasing shoulder rubs and slipped rugs around the paddock. Wholesale Horsewear House has been measuring up Australian horses since 2005 — here’s the method we use behind the counter at Toowoomba and the size chart that fits.
The one measurement that matters
If you only take one number off your horse, take this one: the straight-line distance from the centre of the chest, around the widest part of the shoulder, along the side of the body, to the centre of the tail. That single measurement — given in feet and inches — is the size on the rug label. A 6’3 rug means a horse measuring 6’3 along that line. There is no second measurement, no chest size, no neck size, no drop. The Australian rug industry has standardised on this single line for decades and every rug we’ve ever made at Wholesale Horsewear House follows it.
The reason it works is geometry. The line you’re tracing is the path the spine of the rug will sit along when it’s on the horse. If the tape says 6’3 from chest to tail, a 6’3 rug will reach from where the chest buckles sit to where the tail flap drops. Anything shorter rides up the rump; anything longer drags on the ground at the back and rubs the shoulders at the front. Across our entire range — Breatha Combo, Highlander Quilted Combo, Simpson Lined Combo, Arctic Combo — the labelled size is built around this single measurement.
What you need before you start
Three things make this easy and one thing makes it hard. The three: a soft fabric tape measure (the dressmaker kind, not a steel builder’s tape — steel won’t bend around the shoulder), flat ground, and a calm horse standing square. The hard thing is doing it on your own. You can — we do it solo at the counter all the time — but it’s far cleaner with two people: one to hold the chest end of the tape in place, one to walk the line back to the tail.
Quick checklist before you start: pick a level patch of yard, not a slope. Stand the horse square, weight on all four feet, head up but relaxed. Don’t measure a horse that’s mid-stretch, mid-shake, or with one back foot cocked — the body shape changes. A two-dollar fabric tape from the chemist is perfect; we’ve never owned a more precise instrument behind the counter than that. Take the measurement twice. If both numbers come within an inch of each other, you’re right. If they’re three or four inches apart, the horse moved — reset and measure again.
The step-by-step method
Here’s the exact sequence we walk through with customers who phone in unsure. It takes about ninety seconds with two people, a touch longer on your own. The three steps below mirror what the measuring diagram above is showing — chest, shoulder, tail — broken down so each one is hard to get wrong.
Three steps, one number
Do these three in order and the rug will fit on the first try
Step 1
Place the tape
Hold the zero end of the tape flat against the centre of the chest, level with the point of the shoulder. Keep it horizontal — not riding up the neck, not sagging toward the floor.
Why it matters: the start point is the front edge of the rug. Two inches up or down here is two inches off the labelled size.
Step 2
Walk the line
Carry the tape around the widest part of the shoulder, then back along the side of the horse, parallel to the spine but sitting on the body — not above it. Keep the tape snug against the coat the whole way.
Why it matters: a tape that floats above the body adds phantom inches. A tape that follows the curve gives the true rug-spine length.
Step 3
Read at the tail base
End at the centre of the dock — the bony top of the tail — not the hindquarter, not the rump, the tail itself. Read the tape at that exact point. Round to the nearest 3-inch increment (rugs come in 3″ jumps: 6’0, 6’3, 6’6).
Why it matters: rug sizes are 3-inch jumps for a reason — anything finer than that gets lost in fit tolerance once the rug is on.
The most common mid-measure problem is the horse swinging the quarters. If the back end moves a step left or right while you’re walking the tape, the line stops following the spine and you’ll read an inch or two longer than you should. Stop, reset, start over. It’s faster to redo it once than to wear a rug that doesn’t fit for a whole winter.
Reading the number — feet and inches vs centimetres
Australian, British, Irish and New Zealand rug brands all size in feet and inches. European and some American brands size in centimetres. If you’re buying a rug from us — or any of our wholesale partners — you’re in the feet/inches world. The conversion is straightforward: a 6’3 rug is roughly 190cm; a 6’6 is roughly 198cm; a 7’0 is roughly 213cm. The exact maths is 1 foot = 30.48cm, but rug sizing isn’t metric-precise anyway, so the round numbers above are what we use.
One thing that catches people out: a 6’3 rug is six feet three inches, not “six point three feet.” If you have a number like 75 inches on your tape, divide by 12 to get 6.25 — that’s six feet and a quarter of a foot, which is six feet and three inches, so the rug size is 6’3. If you’re ever unsure, phone the shop on (07) 4613 5599 and read us the inches number off the tape — we’ll convert it for you.
The Wholesale Horsewear House size chart — 3’0 to 7’0
We carry sizes from 3’0 to 7’0 across most of the range — far more sizing depth than most competitors — because a shetland and a 17hh warmblood both deserve a rug that actually fits. Below is the cheat sheet our counter staff hand out to customers who phone in for sizing. Match your horse’s type to the row, take the tape measurement, and use that to choose the labelled size.
Full WHWH size chart
Horse type — rug size in feet/inches — approximate body length — typical stock depth in our range
For minis and foals, the rugs that sell in those sizes through our store are the Mini Elite Combo, the Mini Simpson Lined Rug, and the Mini Simpson Unlined Combo — see the full Miniature Horse Rugs category for the lot. For ponies through warmbloods, every rug in our range scales across the size band — Highlander Quilted Rug, Sunny Plus Combo, Stradbroke Combo Jute, Husky Combo, Perisher Combos — with the larger sizes typically running in the heavier ranges where bigger horses need more rug.
The four sizing mistakes we see every winter
Most fit problems aren’t bad rugs — they’re measurements done wrong. After two decades of phone calls from frustrated horse owners on a Friday afternoon, these are the four mistakes we see again and again. None of them are about being careless. They’re about following the wrong instruction the first time you measure and then sticking with it.
The mistakes that cost a winter
Four sizing errors we hear about every cold snap — and the fix for each
Mistake 1
Measuring the side only
People put the tape on the wither and run it back to the tail, skipping the chest and shoulder curve. That misses 4–6 inches. The rug arrives a size too small, rides up the rump, and rubs the shoulders.
Mistake 2
Sharing across two horses
“They’re about the same size” — never true. Two horses an inch different in body length will fit two different rug sizes. Measure each horse separately, even if they’re paddock mates.
Mistake 3
Buying for the lighter horse
If two horses share a rug and you size for the smaller one, the rug strangles the bigger horse’s shoulder. Size for the larger horse and accept the smaller will have a little extra at the tail.
Mistake 4
Ignoring shoulder gusset depth
Two rugs at 6’3 can fit very differently because the shoulder gusset — the panel that lets the shoulder rotate — can be shallow or deep. Broad-chested horses need deep gussets; phone us if unsure.
When you’re between two sizes
Tape measurements rarely land exactly on a 3-inch increment. You’ll get something like 6’1, or 6’4, or 5’10. Now you’re choosing between two labelled sizes — round down or round up? The answer depends on the horse and the rug, but there are reliable rules.
Round up if: your horse is clipped (rugs sit closer to the skin and binding rub is worse), if your horse is over 20 (older skin is more sensitive to chafing), if the rug is heavier (Arctic, Husky, Perisher style — the extra fill takes up more internal volume), or if you’re buying a rug to last through a season of winter weight gain. Going up from 6’3 to 6’6 gives you fit tolerance and a little extra room for the chest to expand on cold paddock nights.
Round down if: your horse is broad through the chest and tight through the loin (a common Quarter Horse / stockhorse shape), if you’re buying a light summer rug like a Sunny Plus Combo or a Stradbroke Combo Jute where you want the rug to sit snug to stop fly entry, or if your horse tends to lose weight over winter and you’re sizing for the leaner February shape rather than the carrying-condition May shape.
The default if you’re genuinely unsure: round up. A slightly large rug can be adjusted with leg straps and surcingles. A slightly small rug can’t be made bigger. We sell replacement surcingles and leg straps at the counter for exactly this reason — quick fixes for a rug that’s otherwise fine. For deep cold and clipped horses choosing between heavy options like the Arctic Combo or Perisher Combos, round up every time.
One related question we get often: how does weight band interact with sizing? If you’re still working out which weight to buy in the first place — light, medium, heavy — we covered that decision in detail in our Australian climate rug-weight guide. Pick the weight there, then pick the size here.
Wholesale Horsewear House — phone us if in doubt
We’re a family-run saddlery at 528 Alderley Street, Toowoomba, founded by Geraldine Lalor in 2005. We design the GTL rug range ourselves and ship every order from our Toowoomba warehouse — and GTL is now stocked at saddleries across Australia and New Zealand. Twenty years of measuring up Australian horses behind the counter means we’ve seen every body shape, every breed, every awkward in-between size. If your tape measurement lands somewhere odd, or your horse has an unusual build, phone us on (07) 4613 5599 and we’ll talk it through.
We sponsor Burrandowan Campdraft, Killarney Polocrosse Club, and the Steve Smith Horse Breaking show team — the working horse people whose feedback shapes the next year’s GTL range. Free postage on every order over $500. Drop in if you’re nearby — Mon–Fri 8:30am–5pm, Sat 8:30am–12pm — or browse our full horse rug range online.
Related reading from the Wholesale Horsewear House Horse Rugs guide
Measuring is one piece of the rug decision. We’ve covered the other pieces of the same puzzle in companion guides — weight, neck cover, durability, and rugs for sensitive horses — below.
What weight horse rug do I need? An Australian climate guide
The companion piece to this one. Once you know what size to buy, you need to know what weight — light, medium, heavy, or arctic. We break it down by Australian climate zone, with the right rugs from our range for each.
Rug vs combo: when do you need the neck cover?
A combo covers the neck; a rug doesn’t. The choice depends on where you live, whether the horse is paddocked or stabled, and how much wind and rain you get. We explain when the extra neck cover earns its keep.
How long does a quality horse rug last?
A well-fitted GTL or Highlander combo routinely lasts four to six winters on a paddock horse. Stable rugs last longer. We cover what shortens the life of a rug — and the maintenance habits that double it.
Best horse rugs for sensitive-skinned horses
Sensitive horses, thin-skinned thoroughbreds, and horses recovering from rain scald all need a rug that breathes well and sits soft on the coat. We walk through the rugs from our range that suit those horses best.
Browse the full Wholesale Horsewear House horse rug range
From minis at 3’0 through to warmbloods at 7’0, our entire horse rug catalogue is in one place. Filter by weight, neck cover, or size — or phone us on (07) 4613 5599 if you’d rather we picked one for you.
Sources
Guidance in this article reflects the typical experience of Australian horse owners across the WHWH customer base and is intended as general sizing information for horses in normal body condition. Individual horses vary — broad-chested horses, deep-shouldered horses, older horses, and horses with unusual builds may need a different approach. If in doubt about your specific horse’s measurement, speak with your saddlery or call us on (07) 4613 5599 and we’ll talk you through it.
