Horse Rug Size Calculator

Stand your horse square on level, flat ground. Use a soft tape measure, place one end at the centre of the chest where the neck meets the body, run it along the side of the horse keeping the tape parallel to the ground, and finish at the point of the buttock (the outer edge of the hindquarter). The reading in inches (or centimetres) is what you enter into the calculator above.

It depends on your horse's individual chest-to-buttock measurement, not just its height or breed — enter your measurement into the calculator above for a UK size in feet and inches. As a general guide, most adult horses fall around 6'0" to 6'9", ponies around 4'6" to 5'6", and miniature horses under about 4'0", but always measure your individual horse rather than relying on breed averages.

Because that is how UK rug retailers actually label and sell their products — sizes step in 3-inch increments (5'6", 5'9", 6'0", 6'3", 6'6"...) rather than the plain-inch numbering some other markets use. The calculator converts your raw measurement into this feet-and-inches format directly, alongside the plain-inch and centimetre equivalents, so you have the exact figure to look for on a UK retailer's size chart.

Several UK retailer guides recommend adding roughly 3 extra inches to your raw measurement when buying a turnout rug that will be worn with an attached neck cover, compared with a closer-fitting stable rug. This extra ease allows for full freedom of movement outdoors and avoids the rug pulling tight across the shoulders when combined with a neck cover. The calculator applies this automatically when "Turnout rug" is selected and shows you exactly how many inches were added in the breakdown table.

Choose "Turnout rug" if the rug will be worn outdoors, especially with an attached neck cover, since the extra ease reduces the chance of restriction during movement. Choose "Stable rug" for a closer-fitting indoor rug, cooler, or any covering that does not need the same freedom of movement — stable rugs are typically sized closer to the raw measurement without the extra allowance.

Neck covers are sized to match your horse's rug size number directly — if your horse takes a 6'6" rug, you would normally choose a 6'6" neck cover from the same range or a compatible brand. The calculator's dashboard shows this alongside your rug size so you don't need a separate lookup.

The majority UK retailer recommendation, and the calculator's default "Standard fit" setting, is to round up to the larger size, especially for bulkier winter turnout rugs. If your horse is notably narrow-chested or petite, or you would rather size down for a closer fit, switch the fit preference to "Snug fit" and compare both results before you buy.

Not directly — rug size is driven by your horse's individual body length (the chest-to-buttock measurement), not its breed as such. However, breed build tendencies do matter for fit even at the correct length: narrow-chested breeds like Thoroughbreds and Arabians often fit well straight off the size chart, while broader-chested breeds like cobs, warmbloods and drafts sometimes need a specific "wide" or draft-cut version of the same length size for a comfortable shoulder fit.

Not as reliably as full-size horse rugs. Pony and miniature sizing varies more between manufacturers, and several brands offer specialised cuts (for Shetlands, Miniatures or Friesians, for example) that don't follow the general 3-inch UK ladder exactly. Treat the calculator's result as a solid starting point in this range, but check the specific product's own size chart before buying, and consider trying the rug on if you can.

First double-check your measurement was taken correctly (tape level and parallel to the ground, horse standing square, centre-of-chest to point-of-buttock) and that you selected the intended rug type (Turnout adds ease; Stable does not). If the measurement and rug type are confirmed, remember that different brands and even different product lines from the same brand can cut slightly differently at the same nominal size — a well-fitting 6'6" rug from one brand does not guarantee the same fit in a 6'6" from another.

You can use height as a rough starting guide, but it is not reliable enough to buy from directly — two horses of the same height can have very different body lengths depending on their build, so a height-based estimate can be off by a full size or more. Measuring your horse directly with a tape, as this calculator expects, is the method every major UK retailer actually recommends for buying.

It's worth rechecking at least once a year, especially at the start of rug season, since weight changes, muscle development, and normal growth (in younger horses) can shift a horse's measurement enough to change the recommended size. A rug that fit well last winter is not guaranteed to fit the same way this winter.

These terms overlap heavily and vary by region: "rug" is the more common UK/Ireland/Australia term and "blanket" is the more common US term for the same type of horse covering, both measured and sized the same way (chest-to-buttock), though UK rugs are conventionally labelled in feet and inches while US blankets are more commonly labelled in plain inches. "Sheet" usually refers to a lighter, unlined layer (for warm weather, travel, or as a base layer under a heavier rug), while "rug"/"blanket" more often implies some level of insulation or waterproof outer fabric.

Almost certainly not for a live horse — even miniature horses are generally at least 30" and the very largest drafts rarely exceed 100" on this raw measurement. The calculator flags results outside this range as "Check Your Measurement" rather than showing a number, since it likely means the tape wasn't run the full chest-to-buttock line, the wrong unit was selected, or a decimal point was misplaced.

You can, but it's a guess rather than a fit — "large horse" or "cob-sized" descriptions cover a wide range of actual measurements, and buying on that basis is one of the most common reasons a rug doesn't fit properly when it arrives. A two-minute tape measurement removes almost all of that guesswork and is the method every major UK retailer's own guide recommends.