It could be worse--5 is actually on the larger side of the steel hooks. I've got a 14 (an aunt gave me all her old crochet hooks and yarn a while back) that doesn't look like it would hook sewing thread, let alone anything else. Needless to say, I've yet to use it.
Actually a 14 will hook sewing thread. I tried it once and went all cross-eyed trying to see the stitches. You need patience and a lot of good light to work with the tiny hooks. I've got a 15 and a 16 too, but haven't been brave enough to try using them. :-)
Btw, I love the earrings. With a little modification they look like they could be pentacles.