Windsor Saddlers - Belt Company
Sizing & Measurement
How to measure your belt size
NOTE:  trousers/jeans are made differently and two pairs are never the same size - try it - measure your waist and check what size trousers you wear.
Sampe Belt Sizing Diagram
Note : "size" refers to the measurement of the belt taken from the middle of 5 holes and includes the amount added by the buckle to the belt's effective length. To establish the size of your new belt you may use any of the following methods :
1.       Simply measure with a tape over the type of clothing you anticipate wearing (as if the tape were the belt). The measurement will be that of your new belt to the middle of five holes including the buckle. 
2.        Or, measure a belt that you already have. Lay out the belt and measure the distance from the hole at which you wear it to where that hole will sit on the prong of the buckle when fastened (i.e end of the buckle). Please see above diagram. This gives the optimum size and will be the middle hole of your new belt.
3.          Or, if ordering by trouser size, please use tape measure to measure your wear your belt. Most commonly, a person who thinks they are a size 36 for trousers will be a size 38 or 40.