Tools you might need next
Estimate horse body weight from heart girth and body length measurements. Use the standard equine weight formula for dosing, feeding, and transport planning.
Calculate and assess horse hoof angle from toe length and heel height measurements. Guide for farrier trim balance and conformation evaluation.
Calculate daily horse hay and grain feeding requirements by body weight, workload, and life stage. Forage-first ration planning for equine nutrition.
Measure thigh from hip bone to knee. A 22-inch thigh suggests 15–16 inch seat. Add 1 inch for dressage position; subtract for jumping.
Seat = Thigh length (in) ÷ 2 + 14–16Tree width matches horse's shoulder and wither shape, not just size. Medium fits average Warmbloods; narrow for high-withered TBs; wide for broad flat backs.
Narrow/Medium/Wide/X-Wide by wither templateWestern saddles measure differently — a 15 inch Western equals roughly 17 inch English. Western seats run 13–17 inches typically.
Western seat ≈ English seat − 2 inchesUpdated: July 2026
Rider with 21-inch thigh and 140 lb weight fits 16.5 inch seat with medium-wide tree on a stocky Quarter Horse cross.
High withers and narrow A-frame conformation require narrow or medium-narrow tree despite 16 hh height — gullet clearance of 2–3 fingers at wither.
Thigh length increased from 20 to 23 inches — upgrade from 15 to 16.5 inch seat while maintaining proper tree width for the same horse.
Proper saddle fit protects horse and rider from pain and injury. Enter rider thigh length, weight, and horse wither/trade measurements to estimate correct seat size and tree width for English or Western saddles.