Horse Rug Size Calculator – What Size Rug Does My Horse Need?
One tape measurement from chest to tail gives the UK rug size in feet and inches, plus the centimetre equivalent.
How to measure for a rug
Stand your horse square on level ground. Start the tape at the centre of the chest, where the two sides of the chest meet, and run it in a straight line along the body to the point of the buttock – the very back of the hindquarters, at the top of the tail. Keep the tape level rather than letting it dip, and ask someone to hold the chest end so it does not creep. Measure twice and use the average.
How UK rug sizes work
British rugs are sold in feet and inches, in three-inch steps: 5'6", 5'9", 6'0", 6'3" and so on. To convert, divide your centimetre measurement by 30.48 to get the length in feet, then round to the nearest three inches. Many European brands size the same measurement in centimetres, so a 6'0" rug is around 183 cm.
Worked example
A measurement of 183 cm divided by 2.54 gives 72 inches. Rounded to the nearest three inches that is still 72, which is 6 feet exactly – a 6'0" rug, or 183 cm in European sizing. A horse measuring 176 cm works out at about 69 inches, giving 5'9".
Checking the fit once it arrives
- The rug should sit behind the withers, never pressing on them.
- You should slide a flat hand between the chest fastening and the horse.
- The back edge should reach roughly the top of the tail.
- Leg straps should allow a hand's width and be linked through each other.
- Watch for rubbed hair at the shoulders and withers – the classic sign a rug is too small or the wrong cut.
Cut matters as much as size
Two 6'0" rugs from different brands can fit very differently. Cob-cut and wide-gusset rugs suit broad, short-backed natives; deeper drop suits horses that live out. If your horse is between sizes, size up for stable rugs that go over other layers and down for close-fitting fly sheets.
Does your horse need a rug at all?
Healthy, unclipped horses with a decent coat and access to shelter often cope perfectly well without one, and over-rugging is a genuine cause of weight gain and overheating. Rugs earn their keep for clipped horses, veterans, poor doers, thin-skinned types and fields with no shelter. Check under the rug daily: your horse should feel warm and dry behind the shoulder, not sweaty.
Frequently asked questions
How do I measure my horse for a rug?
Measure in a straight line from the centre of the chest, along the side of the body, to the point of the buttock. Keep the tape level and have someone hold the end at the chest.
How is UK rug size worked out?
UK rugs are sized in feet and inches, in three-inch steps. Divide your measurement in centimetres by 30.48 to get feet, then round to the nearest three inches – for example 5'9", 6'0" or 6'3".
What if I'm between two sizes?
Go up for a chunky cob, a horse with big shoulders or a stable rug worn over other layers. Go down for a fine-built horse or a close-fitting fly rug.
What do the cm sizes on European rugs mean?
Continental brands size in centimetres measured the same way, so a 6'0" rug is roughly 183 cm. Always check the brand's own conversion chart before ordering.
How do I know the rug fits?
You should fit a hand's width at the chest, the withers should not be pinched, the rug should sit behind the withers, and the back edge should reach the top of the tail. Leg straps should allow a hand's width.
Does my horse even need a rug?
Many healthy, unclipped horses with shelter do not. Rugs matter most for clipped horses, veterans, poor doers and those without shelter. Over-rugging is a common cause of weight gain.
How tight should the straps be?
Chest and surcingles: a flat hand's width. Leg straps: a hand's width, linked through each other so they do not rub.
Estimates only – not a substitute for advice from your vet.
Last reviewed: 22 September 2026