Bought a size M according to my measurements and the table. For reference, I am EU size 32/34 (S) - the cosplay in M still feels quite short on the body (an S I would probably not been able to pull up to cover my chest) but everything else is a little too big. The accessories (cuffs, collar) are all way too big. the pin on the tail is not the strongest, so maybe sew it on just in case to not lose it...
I'm giving 3 stars in total because the delivery and handling of the item was satisfactory. While I was not "too satisfied" with this particular item, I am satisfied with dokidoki as a whole and would much rather order costumes off of Dokidoki than any other website.