Why are there only floor length dresses for fat women?

Ok, so Im an American size 6, which isnt too small and isnt too big.

I want a pretty and femenine long floor length night gown dress.

Like this, but prettier...

http://www.gaiam.com.au/Product_Detail.aspx?ProductID=7925

More vintage, 1960s, like this.

http://www.heavenlyvintagelingerie.com/store/item/60084.Embroidered.Heavenly.Blue.Vanity.Fair.Plus.Nightgown.~.42

BUT whenever I try to find one, the sizes are only for 12 to freaking 24! It's so annoying. Is it that they just sell out before I get to them, or is it that these are the only jammies that fat women can wear?

Do you know where I can find small long nightgowns? I have tried places like Target, but it's all the same.

(I cant purchase things online).

victoira secret has them or go to sears they have them also

Because no one wants to see their canckles and cottage cheese, and the dress makers know that.

i never see floor length night gowns, they seem uncomfortable

To hide cankles.