Could anyone tell me how the Circle Y Jackies fit as far as seat sizing as compared to a bob marshall?  Also concerned about the length of the skirt, I have a large pony/small horse that is very short backed.  

I think the BM seat sizing may be just a tad snugger then a Circle Y, I have rode in the  Original BM and have one now, I have also have had a Circle Y BM and it just seems to me the Circle Y's are a bit stiffer made saddle so I would think the Jackies would be more padding and a little stiffer then the Original BM's. The skirts are a little longer but The Orignial Bob Marshalls you can get a round skirt and they are made for the shorter backed horses. A round skirted BM would suit your horse better then a square skirt.  

Thank you