And the goggles in turn are going to need some pretty good attaching to you. If you depend on your ears to hold that whole costume up against the tension of the fabric, they’re going to be sore pretty quick. It would be best if you included another feature—say, a narrow strap that goes over the top of your head, as close to your hair color as possible—to support the weight and stress of the material.
You might want to try this solution first in throwaway cotton or other cheap material just as a proof of concept.
In any case, be sure to reinforce both the top and the front edge of the fabric and especially the corners.
If this were my costume and I were planning to wear it for some length of time, such as at an evening event, one thing I’d do is incorporate some sort of built-in fallback in case it becomes too hard to sustain: for instance, making sure the neck portion can be detached from the goggles and rolled or folded down into a collar while leaving the goggles wearable and without the attachment apparatus showing.
Similarly, when I made a cat costume one time, I attached the tail with three snaps so it could be removed for sitting comfortably en route to the party.