whats the material on the tag in the dress say thats how u should be able to tell should be a spandex type material if it is it should stretch enuff it look like it would fit my sis shes bout 230-250 hope this helps
it should fit her if it is if she gets it and it dont she can always post it back on here or save it til summer thats when most ppl lose weight to hot to eat sleep or anything :)