Horse Rug Size & Fit Guide: How to Measure Your Horse for a Rug

How do I measure my horse for a rug?

Measure from the centre of the chest to the point of the buttock. The British Horse Society recommends using a soft measuring tape, taking it around the widest part of the shoulder and along the side of the horse.

1. Stand your horse square on level ground.
2. Place a soft tape measure at the centre of the chest.
3. Run the tape around the widest part of the shoulder and along the side of the body.
4. Measure to the point of the buttock.
5. Use this measurement as your starting rug size, then check the size guide for the brand and rug you are buying.

Tip: Ask someone to help hold the tape if needed. Keep it following the horse’s body rather than pulling it tight or letting it sag.

Horse rug size chart: what do feet, inches and centimetres mean?

UK and Irish horse rug sizes are commonly shown in feet and inches. The table below gives the equivalent chest-to-buttock body measurement in inches and approximate centimetres.

Do not assume that a centimetre rug label is simply the feet-and-inches size converted to centimetres. Some manufacturers also use a back-seam measurement in their metric sizing. For example, Horseware lists a 6'3" size as a 191 cm body measurement and a 140 cm back measurement. Always use the individual manufacturer’s size chart.

That is also why a horse that wears one size in one brand should not automatically be assumed to wear exactly the same cut in every other brand.

How should a horse rug fit?

A well-fitting rug should stay secure without restricting movement or creating pressure. Check the fit at the chest, shoulders and withers first, then look at the overall length and the adjustment of the straps.

Chest

The front should sit securely without pulling tightly across the chest. As a practical check, you should be able to place a flat hand between the rug and the horse around the chest and shoulder area without excessive pressure.

Shoulders

Your horse should be able to walk freely without the rug dragging backwards or restricting the point of the shoulder. Watch the horse move rather than judging the fit only while standing still.

Withers

The rug should not create concentrated pressure, rubbing or be pulled tightly backwards over the withers. Check this area regularly, particularly when trying a new brand or cut.

Length

The rug should provide appropriate hindquarter coverage without hanging so far beyond the horse that it pulls backwards, slips or interferes with movement.

Cross surcingles and leg straps

Fasten straps so that they are secure but not overly tight. Follow the manufacturer’s fitting instructions for the specific rug, and check that straps cannot hang low enough to become unsafe.

Whenever you use a new rug, check your horse after movement and turnout. A rug that looks acceptable when first fitted may settle differently once the horse has walked, grazed or rolled.

How can I tell if a horse rug is too small or too big?

A rug is likely to be too small if it pulls across the chest or shoulders, restricts movement or creates pressure. A rug may be too large if it slips, hangs excessively or cannot be adjusted securely.

Signs a horse rug may be too small

• Tight pulling across the chest or point of shoulder
• The rug is dragged backwards behind the withers
• Restricted shoulder movement
• Pressure, rubbing or hair loss at the chest, shoulders or withers
• Insufficient hindquarter coverage

Signs a horse rug may be too large

• The rug repeatedly slips sideways or backwards
• Loose or unstable front fastenings
• Excess material hanging around the hindquarters
• The surcingles or leg straps cannot be adjusted safely
• The neckline or front sits too low and allows excessive movement

What if my horse is broad-chested, narrow or high-withered?

Choose for shape as well as length. If the measured length looks correct but the rug is tight at the chest or shoulder, a different cut may fit better than simply buying a longer rug.

Cobs, Irish Draught types, Thoroughbreds, high-withered horses and especially broad or narrow horses can fit very differently even when their chest-to-buttock measurement is identical. Some manufacturers offer different cuts specifically for broader, narrower or high-withered horses.

If a rug is consistently tight through the shoulders, slips backwards or rubs despite the length looking right, compare a different cut before automatically moving up a size.

What if my horse measures between rug sizes?

Do not automatically size up without checking the horse’s build and the manufacturer’s chart. A longer rug does not necessarily solve a tight chest, while an oversized rug may slip or become difficult to adjust safely.

Compare the nearest sizes, consider the horse’s chest and shoulder shape, and check the brand-specific fit advice. If possible, keep the rug clean and fully resaleable while you assess the fit in line with the retailer’s returns conditions.

Can I use this measuring method for turnout, stable, fly and cooler rugs?

Yes, the chest-to-buttock body measurement is a useful starting point for many standard horse rugs. It can help when choosing turnout rugs, stable rugs, fly rugs, sheets and coolers, but the intended fit and cut can differ between rug types and brands.

Exercise sheets, foal rugs, neck covers and other specialist products may use a different sizing method. Always check the individual product page before ordering.

• Shop all horse rugs
• Shop turnout rugs
• Shop stable rugs
• Shop fly and sweet itch rugs
• Shop cooler rugs

If you know the size but are unsure how much insulation your horse needs, read our Horse Rug Weight Guide

What should I check before using a new rug?

Check the fit before the rug becomes dirty or used. Stand your horse square, fasten the rug according to the manufacturer’s instructions, check movement at the chest and shoulders, and make sure the rug sits straight and securely.

• Check the chest and shoulder before moving the horse.
• Walk the horse and reassess the shoulder and wither fit.
• Check that surcingles and straps are safely adjusted.
• Confirm the rug is not pulling backwards or slipping sideways.
• Once in regular use, remove the rug daily to check for rubbing, soreness or discomfort.

Horse rug size and fit FAQs

Sources and review information

British Horse Society: Types of rugs and rugging a horse — last reviewed 7 August 2026.