The butterflies are approx 2.5cm on stud backs.
 
These are the Lesser Known Resine Acrilycus Butterfly - known only to frequent the red laser cutter flower. We've managed to strike up a deal with them that they will sit prettily as earrings for ever and ever, as long as you never walk past a red laser cutter at 7pm on Thursdays. That's when all hell breaks loose.