Vintage Larry Mahan Ostrich Quill Leather Boots. Full Quill Ostrich leather Cowboy boots. They're a butterscotch caramel two tone color with a darker leather and stitching design on the calf. Ostrich leather is often considered to be the highest-quality leather in the world-it is tough and pliable, which makes it ideal for boots. These amazing boots are made to last. Size 9.5DNOTE: These boots are structurally sound and will last. They do have some cosmetic wear to them, a toe scuff, dark mark on the exterior upper side and heel scuffs. This is highlighted in the last photos. Tags; western, ostrich, festival, vintage, cowgirl, Size 9.5 ostrich ostrich Larry Mahan quill cowboy boots