Ensuring your horse’s rug fits correctly is just as important as choosing the right weight or style. A poorly fitting rug can lead to rubbing, discomfort, restricted movement or slipping during wear, something every horse owner wants to avoid.
In this guide, we’ll cover how to measure a horse for a rug, how to select the right size from a rug size chart, and what to look for when checking the fit to make sure you horse's rug wont slip, rub or restrict movement. These simple steps will help keep your horse comfortable, secure and protected in their rugs, all year round.
1. How To Measure A Horse For A Rug
Getting an accurate measurement is the first step in finding the perfect rug. Even if you think you already know your horse’s size, it’s always best to double-check, especially as sizing can vary between brands and your horse’s shape may change over time. To find your horse's rug size, you need the measurement in centimetres or inches for the length of the their body.
Step-by-step measuring guide:
- Before you start to measure, make sure your horse is standing square on level ground.
- Use a soft tape measure or a piece of string that you can measure afterwards.
- Start at the centre of the chest just at the point where the base of the neck meets the body.
- Measure horizontally along the body, passing over the point of the shoulder and along the belly.
- Finish at the end of the rump (around the midpoint at the back of the hind leg) to get your final measurement.
Taking the time to measure a horse for a rug correctly ensures you’re choosing the right starting point to purchase a rug.
2. Horse Rug Size Guide
Understanding horse rug sizes can make buying new rugs much easier. Once you have your horses measurement in centimetres or inches, you can covert the number to the size of rug you'll need. UK horse rugs are typically measured in feet and inches, and most brands offer sizes in 3-inch increments but it's best to check individual brand size charts where possible.
Here's our handy horse rug size chart below to help you find the most accurate size of Masterclip horse rugs for your horse or pony. If your horse is between sizes, rounding up the largest size often ensures a more comfortable fit.
3. How To Check The Fit Of A Horse Rug
Once you’ve chosen the right size, it’s essential to check the fit carefully. A well-fitted rug should sit comfortably without restricting movement or causing pressure points. Here are the key ares to check:
Front Straps
- The rug should overlap at the chest and velcro tabs should easily align.
- The top chest strap should align with the point of shoulder. If it sits too low it's likely the rug is too large.
- Fasten top and bottom chest straps on the same hole (even if the bottom feels slightly looser)
- You should be able to fit your hand comfortably underneath.
- Trigger clips should face inwards towards the chest to prevent snagging on haynets or fencing.
Surcingles
- These straps cross over diagonally under the belly to keep the rug secure and prevent it from slipping to one side.
- Each surcingle features a sliding buckle to adjust the length of each strap, allowing you to tailor to fit around the belly. They should be snug but not tight.
- You should be able to fit a full vertical hands width between the straps and your horse's belly to give them enough room when moving around but not too loose that they might catch a leg through the straps when they roll.
Tail Flap & Fillet String
- Some rugs have interlocking hind leg straps, but the Masterclip horse rugs feature a simple elasticated PVC coated fillet string designed to slip under the tail and keep the rug in place, even in windy weather.
- You should be able to fit a flat hand between the strap and the horse and the tail should sit comfortably over the top.
- The tail flap on turnout rugs should cover the top of tail loosely. If you find the tail flap rides high up from the seam, it's likely to rug is a little too small.
Overall Fit
A properly fitted rug will stay in place while allowing your horse full comfort and freedom of movement. Check these key areas:
- The rug should sit level across the back without any creases.
- When the horse is moving it should stay in place and not slide to either side.
- Check it doesnt pull tight across the shoulders or slip backwards when the horse puts their head down to graze. Your horse should be able to lower their head and move freely.
- You should be able to slide a hand easily between the rug and neck/shoulder all the way around the front.
Rug Fitting Top Tip: When checking the fit of your new horse rug, make sure your horse is clean before trying it on. If that’s not practical, pop a lightweight sheet underneath to keep the rug protected. This helps to keep it free from hair and marks should you need to return it if the fit isn’t quite right. Marked or soiled items may void your right to return it if you find the rug isn't quite the right size!
Finding the Right Rug for your Horse
Finding the right fit when rugging a horse is essential for both comfort and safety.
Taking accurate measurements and using a reliable horse rug size guide will ensure you purchase the correct size.
Tailor the fit by adjusting the straps and surcingles then carefully check the fit around the neck, quarters and belly. Watch for the rug sliding to one side, bunching up or pulling tight.
The right size rug, properly adjusted will ensure your horse stays protected without any risk of rubbing or restriction.
If you’re unsure which size or style is best, explore our range of premium horse rugs or get in touch with our team—we’re always happy to help you find the perfect fit for your horse.
How do I know if my horse’s rug is too small?
A rug that’s too small will often feel tight across the chest and shoulders, causing rubbing or restricting movement. You may notice pressure points on the withers, hair loss around the shoulders, or the rug slipping backwards. If your horse struggles to lower their head comfortably or the front won’t fasten without pulling, it’s likely too small.
What happens if a horse rug is too big?
A rug that’s too large can slip, twist, or sit too far back on the withers. This can lead to rubbing, gaps that let in cold air or rain, and even safety risks if the horse gets a leg caught. A loose rug may also move excessively in the wind, making it uncomfortable for your horse and not providing enough protection or insulation.
How often should I check my horse’s rug fit?
It’s a good idea to check the fit regularly, especially during seasonal changes. Horses change body condition, build muscle, or change shape throughout the year. Always reassess the fit when you need to rug for each season, when introducing a new rug, after clipping, or if you notice any signs of rubbing or slipping. If you find your clipped horse is more prone to rug rubs even when the fit is just right, our post clip clip features a luxury velvety soft faux fur lining, especially developed to care for clipped coats. You can find more details about our post clip rug here.
