To get a Western seat size, subract 1 1/2" to 2" from your English seat size. I ride in a 17 1/2" - 18" English, and would take about a 16" Western.
Western and English trees are drastically different. Here is some information about trees:
http://lorienstable.com/articles/z-fitting/tree_sizes/
Western saddles can be very hard to fit because they can't be adjusted. Any fit problems are often well-hidden under the skirting, so even if you're decently informed about fitting English saddles it's still hard to tell about a Western saddle. (Incidentally, my book has both English and Western saddle information--see my site for more details:
http://lorienstable.com/book/)
If you can find someone who can measure your horse for size, before you buy a saddle, that might save you huge amounts of time and hassle--and likely money too. Incidentally, the company who made that saddle on ebay (
http://www.doublejsaddlery.com/) looks like they might be a pretty good one. But I have yet to see a TB who would take full QH bars!
only to have it stolen 3 weeks after you buy it!!!!!! 
i cant afford to buy one now!!! have you tried robinsons, i think they sell narrow western saddles?!!!!!
but I have no idea what might be available to you 
However, you could certainly check with the people at the URL that bexj posted--quick call or email, see if they do measuring without sales. And if they don't, they might know someone who does.
)
Hybrid Mode
