This is for a lot of 300 Screw eyes.  The loop is about 1-2mm.  The length is 5-6 mm.  These are insanely useful for crafting and for jewelry making, in particular.  Put a little bit of epoxy inside a bead and slide this in the hole....instant earring charm....just slap on a french hook.  Instantly turn any small toy or figure into a charm.  Soft items....simply screw it in.  Hard items, drill first, apply super glue or epoxy, insert screw eye.