 Saddleseat flat saddle size 21 HorseClicksSaddleseat flat saddle size 21Doylestown, Pennsylvaniaad ref. HT8517E29 - 103 Views21 flat saddle used for saddleseat riding. Used.Equivalent to a 18 english saddle seat size.Doylestown, Pennsylvania ad ref. HT8517E29 - 103 Views 