This little guy (4cm longest dimension) was designed for a customer of mine who was looking to use it as an accent for a bracelet.  I've also included an STL with a hole for that purpose.  It should probably scale up fine if you wish, but he'll be extra floppy as the clearances scale as well.

The design is adapted from Peruvian artist Audakter's flexi ant which was scaled too large for my purposes and so I recreated it completely from scratch.

I printed this with 0.5 line width but I wouldn't go too much wider, as the legs and antennae are about 1mm thick.  Since it's a quick print you should be able to get away with no brim (PLA) if you've leveled your bed.