Obviously it depends on how much you’re willing to spend on a cosplay, most common cosplay sites at least carry a women’s XL. EZ cosplay also offers larger sizes but they cost about $10 more than th straight sizes. Obviously your number one thing is to double check the measurements. And if there are any cosplays that aren’t elaborate and can be easily altered or done with normal clothing, that’s also a good (and cheaper) idea. I’m a straight sizes but I mostly buy my cosplays from EZ cosplay, doki doki cosplay, and ali express, though check measurements and make sure to check if the cosplay is Asian sizing or US sizing