Dress vs. Jumper

A friend of mine asked me the other day what's the difference between a dress and a jumper. In my opinion, a dress is designed to be worn by itself and a jumper is supposed to be threw over something else. Here is how Wiki describes a jumper:

"A jumper (in American English), pinafore dress or pinafore (British English) is a sleeveless, collarless dress intended to be worn over a blouse, shirt or sweater. In British English, the term jumper describes a sweater. Also, in more formal British usage, a distinction is made between a pinafore dress and a pinafore; which, though a related garment, has an open back and is worn as an apron."

Thus, by definition, this is a jumper.

 And this is a dress for having short sleeves.

So the real distinction is that, a dress might look a bit bulky on top of a shirt, whereas a jumper, being sleeveless and collarless, looks just perfect over a long sleeve shirt.

But as I said before, anything you throw on a little girl looks good on her, plus we don't want our little ones to catch a cold during winter, right? So go ahead, let your girl pick her favorite dress and wear it over her favorite white shirt.