How to Measure The Size of a Saddle
Both English and western saddles are measured in inches using the size of the seat. In order to make sure you purchase a saddle that fits you comfortably and properly, you will need to know what size saddle you ride in and how to correctly measure the seat of a saddle. You will need a measuring tape in order to properly measure a saddle.
Place one end of the measuring tape against the center of the pommel of your saddle.
Stretch the measuring tape directly across the seat of the saddle to the center of the front of the cantle.
Record your measurement in inches. If the measurement is not precisely on the inch, round your measurement to the nearest half inch.
Useful Hints: Remember that, with a few exceptions, most western saddles are only sold in whole inch seat increments (14 inch, 15 inch, 16 inch and so on). If you ride in a saddle that offers a half size, you will most likely need to go to the next size up when you are shopping for a new saddle. For example, if you ride in a 15.5 inch saddle, you will probably need to buy a 16 inch saddle.
Place one end of the measuring tape in the center of one of the screws on the side of the pommel of your saddle.
Stretch the measuring tape diagonally across the seat of the saddle to the middle of the cantle.
Record your measurement in inches.
Useful Hints: English saddles are commonly sold in both half and full sizes. As a general rule of thumb, your English saddle size will measure two inches larger than your western saddle size. This means that if you need a 15 inch western saddle, you will ride in a 17 inch English saddle.