If you have a new horse or are just unsure which size rug your horse needs, using a tape measure (or a piece of string you can measure later) measure your horse from the centre of his chest, horizontally along his side finishing where you require the rug to finish. It is best to allow an extra 3" on top of this for turnouts in most cases, especially if the turnout has a neck cover. Stable rugs are usually correct at the measured size. Rugs are sized in feet and inches, every 3". If your horse is between sizes you are usually better to go up a size than down, unless the horse is narrow chested or petite. Ideally, an existing rug in the correct size can be measured all the way along the bottom edge to give the size required.

Rug Size (Feet And Inches) Measurement In Inches Measurement In CM's EU Back Seam In CM's (approx) Fits Approximately Hands
3'0" 36" 91 60 Under 10hh/Foal
3'3" 39" 99 65 Under 10hh/Foal
3'6" 42" 107 70 Under 10hh/Foal
3'9" 45" 114 75 Under 10hh/Foal
4'0" 48" 122 80 10.0hh - 10.2hh
4'3" 51" 130 85 10.2hh - 11.0hh
4'6" 54" 137 90 11.0hh - 11.2hh
4'9" 57" 145 95 11.2hh - 12.2hh
5'0" 60" 152 105 12.2hh - 13.2hh
5'3" 63" 160 110 13.2hh - 14.0hh
5'6" 66" 168 115 14.0hh - 14.2hh
5'9" 69" 175 125 14.2hh - 15.2hh
6'0" 72" 183 135 15.2hh - 16.0hh
6'3" 75" 191 140 16.0hh - 16.2hh
6'6" 78" 198 145 16.2hh - 16.3hh
6'9" 81" 206 155 16.3hh - 17.0hh
7'0" 84" 213 160 17.0hh - 17.2hh
7'3" 87" 221 165 17.2hh - 18.0hh
7'6" 90" 229 175 18.0hh +