All I used for this were the following:
A mechanic's jumpsuit (Which I found in the uniform section of Value Village for $4.99!)
A red and white polka-dot bandana ($2.99 at Value Village)
A pair of old Doc Martens (which I already owned).
Slap it all together and *Ta-Da!*
I didn't really accessorize mine, but as Rosie was a factory worker, it would be easy to add a tool belt or box, with hammers/wrenches, and other assorted things you probably have laying in a drawer somewhere anyway.
Super Easy. Super cheap. Super comfortable. One of my favorite costumes this Halloween season!