Large eye! Small enough to string seedbeads, but with an eye that you can thread easily. The secret is, that it is actually two very fine wires, welded together at each end. Separate the wires in the middle, insert your thread, elastic, cord or just about anything, and away you go! A blessing for those with aging eyes or caffeinated fingers.
They don't last forever, but they will speed your basic stringing so much you will never want to be without them again. These shorter ones - 53 mm - are better for loomwork because of being shorter. 4 to a pack.