To figure out which size you will need, measure with a measuring tape from a hand width above the horse's elbow on one side, down under the belly, to a hand width above the elbow on the other side. Girth lengths are always given from the end of one buckle to the end of the other. This measuring method ensures that buckles lie far enough above the elbows.

For the Western cinch , measure with a tape, from two hand widths above the horse's elbow on one side, down under the belly, to two hand widths above the elbow on the other side. This measuring method ensures that buckles lie far enough above the points of the elbows.

You don't need a specific girth for a treeless saddle, but since treeless saddles should be done up snug, elastics are especially important. Your girth should have at least one, and even better if it has two. This can help to provide secure girthing up. Two elastics, or self-centering girths are best, because they will not pull the saddle over to one side or the other.