[QUOTE=Melissa.Van Doren;7407780]
Prestige saddles will measure (and fit) differently depending on whether they’re foam or flocked. Typically flocked gives more wither clearance.[/QUOTE]
This, for sure. But VTO Saddlery gives some good general guidelines for how the various tree widths fit, and I agree with their appraisal (within the limits of how the panels affect the fit):
“For tree sizes, 33cm and 34cm are considered “medium”. For a saddle that will be used on a variety of horses, 34cm seems to fit most horses very well. 32cm is for a horse with withers and a medium to narrow back. It will fit the typical TB type horse well. We have rarely seen a horse that will take a 31cm, and we have never fit a horse narrower than 31cm. 35cm is considered “wide”. 36cm and 37cm are “extra wide” and we have fit several horses for these sizes.”