This version is an upgrade from http://www.thingiverse.com/thing:337278
This one is much sturdier, has better hinges and is easier to assemble.
Just pinch the earpieces and insert them into the frame.
If you want to adjust the earpieces/frame a little, hold them under hot tap water until they get soft, bend them into the desired shape en let them cool down before assembly.
Show us what color you printed it in!