This costume is adorable!  The antennae and legs are wiry and bendable so you can move them in any direction you want but well secured to the costume.  It is truly one size fits all as my 4 month old fit just fine in it, and it is stretchy so it will fit a much bigger baby too up to 25 pounds.  The fabric is shiny and attractive and had no comfort issues for baby.  My 4 month old does kind of have a small head so the headpiece would kind of flop to the side a bit but was easily re-adjusted.  The perfect thing for this ensemble would be to get a metal bucket (well padded of course!) to put baby in for a photo op and you could also get a chef hat as an adult costume to complete the look.

One important note:  You do need to buy a red coverall underneath it though as it does not come with this costume!