Does anyone know if this in size 3x/4x fits big hips?

Here is the answer you probably already thought but dreaded...some do and some don't. It depends on the cut of the material and how stretchy the material is and if it has an elastic waist band. The crotchless panties I got from EF were very stretchy and fit me great. My hips aren't proportionally correct with y waist either (having kids does that). What I hate even more than find the right size panties is getting a matching bra. My boobs are very large and I guess companies think if you got large boobs then you must have a humongous ass. And if you have have a smaller ass, you boobs must follow suit.

Not really