For best results, print with a 0.1 layer height. 

Two options: triangles pointing up or triangles pointing down. The pointing down option has 2 loop variations. Both worked for me without issue so I'm providing both in case anyone has a preference. Both options are about 2" or 51mm in length. (Length does not include earring finding, just the bead length.)

The bead variations include a small hole or attached loop for findings.