For the flashdrive I used, the dimensions of the circuit board were 14mm by 33mm. It is okay if the Flash Drive is a little shorter than 33mm though. You are ment to print all of the arms and legs separately(preferably in a flexible filament like tpu), and then insert them in along with the flash drive at the end of the first print. You slice the top and bottom pieces as two separate prints, but you place the top piece 7.5mm above the print bed in order to put it on top of the bottom piece. For the eyes and face plate you can just secure them in with a bit of super glue.