Alto is a family of elegant stools created to fulfill a number of seating applications. The curved leather and ply seat of each stool sits, cantilevered, on top of a fluid frame. The stools are available in three sizes, the largest being intended for use as a high bar stool. I designed Alto as a cantilever stool that uses flat oval section steel tube to structural advantage, offering a visual and literal lightness. Michael Marriot. overall dimension high H 34.5 "x L 21" x D 15.6 ", seat H 31.