I have a Thoroughbred saddlery dressage saddle for sale. It is a 17.5 inch seat and a med/narrow tree. The seat runs a bit small in my opinion.(but then again I do have a big butt...) It has a cut back pommel and I believe a 6" gullet. Made to fit a high withered or somewhat narrow horse such as a thoroughbred as the company's name implies. Made in Whalsal England, Lhumlen model. Very well made saddle. Its older but in excellent condition. Much better than most I have seen posted over the years. Rare since they haven't made them for some time. Very supple, well conditioned and cared for. The only flaw I can really say it has is that it is faded and could use a coat of dye. Its like a dark cigar brown. Very comfortable puts you in a perfect position, good support, narrow twist, spring tree. It has a channel designed to alleviate the spine of the horse. It would do well for show with a little touch up, for schooling or a great trail saddle as I used it for if you don't want to trail ride in your show saddle and risk getting it faded or dirty, especially as the brown wont fade like the black will ,but still want to ride in a balanced dressage saddle. I have a Percheron draft now, so it doesn't fit him lol Can email a few more pics of gullet and seat measurement.