I've searched around, and though this might be obvious, I can't find the answer anywhere, but for the riding saddle, is the size listed the size of the mount, or the intended rider?
For example, if a Raxilite is going to ride a horse, would they need Riding Saddle, Tiny, or Riding Saddle, Medium?
I believe that "creature size" in the table is intended to refer to the mount. The size of the mount would make more difference in the amount of material required to hold it in place properly than the size of the rider would.