The feathers on the emu are unique in the fact that there are two feathers to a single quill.
Picture from Carolina Emu
Feathers on an emu range greatly in size and texture. The smallest emu feather may only be an inch long and very soft while the longest feathers are 18 inches or more and feel like straw. However, they all have the double plume, or two feathers coming out of one shaft.