Girths

A girth, sometimes called a cinch (Western US), is a piece of equipment used to keep the saddle in place on a horse or other animal. It encircles the barrel of the equine, and attaches to the billets (girth tabs) of the saddle on either side. Girths are used on English-type saddles, while western saddles uses a girth equivalent called a cinch.

Although a girth is often enough to keep a well-fitting saddle in place, other pieces of equipment are also used in the jumping or speed sports, such as polo, eventing, show jumping, and fox hunting. These include breastplates, breastgirths, breastcollars, and overgirths.
Source

New Girths

Intrepid International Girth Western 24" Non Slip Manufacturer: Intrepid International Feature(s): - A unique polyurethane-coated mesh outer shell - Constructed completely from antibacterial materials - Strong combination of rubberized mesh exterior, strong interior, and stainless steel hardware - Cleaning is a breeze - See below for more information	Kincade Chafeless Leather Girth Manufacturer: Weatherbeeta Feature(s): - chafe-preventing - matches kincade saddle - heavy duty elastic end and roller buckles - sable brown
Exmoor English 4 buckle Fleece Girth Manufacturer: Down Under	Intrepid International Fleece Equalizing Pony Girth Manufacturer: Intrepid International Feature(s): - Elastic at both ends - Fleece on the horse side - Very popular with the Hunter/Jumper gang - Very soft, easy care, and comfy for your horse
Roma Sheepskin Dressage Girth Cover 100% Merino Wool - Black 28" Manufacturer: Weatherbeeta Feature(s): - If you prefer a natural sheepskin girth cover we find this to be the highest quality available - For healing and preventing girth sores nothing more effective than real sheepskin girth covers - Helps prevent sores by reducing moisture pressure and friction between the girth and your horse - 100% Merino Sheepskin	Collegiate Girth with Double Elastic Manufacturer: Weatherbeeta USA
Fleece English Girth Cover - Economy Manufacturer: Happy Tack Feature(s): - Soft fuzzy fleece kind - One size fits all - Cut to length - White Only - English 4" x 36"	Weaver Smart Cinch with patented Roll Snug Manufacturer: Weaver Leather $44.95
Toklat Originals Purple Dressage Saddle Dust Cover Manufacturer: Toklat Originals Feature(s): - Machine Washable - Protects your investment - Slit for long billets - Folds into itself for storage	Roma Merino Sheepskin Girth Cover - Dressage Manufacturer: WeatherBeeta Feature(s): - If you prefer a natural sheepskin girth cover we find this to be the highest quality available - For healing and preventing girth sores nothing more effective than real sheepskin girth covers - Helps prevent sores by reducing moisture pressure and friction between the girth and your horse - 100% Merino Sheepskin