I've got no idea. I think of myself as big - the trendy shops definitely do! But I still have a waist ... somewhere. I'm a size 20, 115kgs and a double DD bra size. I'm definitely shapely - hey round's a shape! :)
In my experiences, different men like different things. Some like big women because they tend to have big boobs. But those kind usually don't have quite as much padding anywhere else. Others like big bootys. Those kind tend to like larger women. The SSBBW's. I have been told by numerous men that I'm too big or not big enough. No in between for some reason. LOL!! I am, however amply endowed in both areas. I get a huge variety of response but nothing ever lasts. Anyway, just in my experience.