I bought this costume last year, and bought for my size based on the measurements provided by the manufacturer. Which is clearly located on Mars.
I am not in size denial. I don't mind buying large clothes to accomodate the fact that I really love delivery pizza.
I'm begging you, if you really want this costume, buy it at least one size larger than your actual, never disclose not even to your best friends, size.
I had to cut myself out of the top. Do you have any idea how difficult it is to cut the side seam of a garment you are WEARING?
In the end, I had to rip out the seams and insert side panels that tied so I could adjust it. The material is not flexible enough to allow you to be a millimeter larger than the costume.
Just keep that in mind.
And keep the seam ripper handy, matey.