The original spiral earring was not printable on a standard Makerbot Replicator nor Ultimaker because;

1. it was too small
2. it lacked a brim so that the item got knocked off the heated build platform during printing.
3. it was oriented sideways

I improved it by;

1. increasing size to 7.62 the size of the original. This is the minimum size so that all the features are at least 0.4 mm in width by 0.2 mm in thickness.
2. I added brim
3. I reoriented it vertical