Jumping Girth Size Guide
First, you should measure your horse after work, this ensures that you get the correct measurement and not one distorted by puffing against the girth buckle.
It is always important to measure your girth length on a saddled and girthed horse. The girth must be buckled evenly on both sides.
Using a soft tape measure, measure from the middle hole on one side to the same point on the other side, always round up if it is between lengths.