There's a new book about costume design called, "Hollywood Sketchbook: a Century of Costume Illustration." I'm no expert but I'll be very surprised if this isn't the best book done on the subject in decades. Take a look at a few pictures and see what you think.
That green dress above looks like something Ginger Rogers might have worn. I like the slanted pose.
Haw! I wonder what film this dress was for. Well, costume design for film isn't the same as fashion design. Costume design for the movies is supposed to heighten our understanding of a particular character in a particular situation in a particular story. It doesn't always aim to make that character look good.
Okay, I recognize these dresses (above) from Caberet.
Yikes! Stork legs!
I know I've seen this (above) design somewhere...maybe on Eve Arden in a 40s film.
What were these sketches for? Commenters said they're Munchkins from The Wizard of Oz.
I threw this (above) in because I liked the back shot of the girl.
Holy Mackerel! This (above) looks like something Bakst would have done, but it's by someone else.