Join Date: Feb 2012
Location: South Wales, UK
• Horses: 0
It's a shame your tack shop lady doesn't seem to know how to measure an English saddle correctly. It's actually from the TOP button to the middle of the back (cantle).
A 14" saddle is usually for a very small child on a pony 11hh or under - anything bigger with an older child and you'd want...15" for an 11.2hh - 13hh, 16" for a 13hh - 14.2hh, 16 1/2" for a 14hh - 15hh. It's impossible to be specific, unfortunately, because these sizes are simply seat lengths and saddles vary in overall size. Plus you may need a bigger-than-ideal seat (or a smaller one) depending on the child. So the seat sizes above are just a general guide.
They you need the right width for the pony, so that's something else to consider.
The saddle you have is unfortunately a cheap foreign one. More often than not they don't fit anything - horse nor rider - very well. It would be worth you checking the front arch, because imminent failure (when they stretch as the rivets begin to break) is one cause of these saddles slipping forwards. The easiest way is to put the saddle on a table facing you, put your hands each side of the front ,just below the lower button, then press your hands towards each other. The arch should be completely rigid and you shouldn't feel it move at all or hear any nasty grinding noises.
I'm afraid I can't help on the crupper thing. In the UK I don't believe they're banned in showing classes but I've never seen one used. It's possibly different over there. Don't ever use one for jumping, though.
Best of lucking finding a saddle that fits :)