overall, school smock, bib, pinny
What do you call the garment children wear at school over their proper clothes?

In Spain we calll it babi.
I have many options but surely there are differences among them.

Thanks

Question

overall, school smock, bib, pinny
What do you call the garment children wear at school over their proper clothes?

In Spain we calll it babi. 
I have many options but surely there are differences among them.

Thanks

Answer

In American English I'd probably call it a smock. Overalls are pants with a bib and straps that go over your shoulders, like what farmers wear. A baby wears a bib to protect his or her clothes when eating. A pinney is usually a colored, sleeveless garment worn to distinguish teams in gym class. A smock is something you wear to protect your clothes if you're painting or doing something messy.  Do you mean something like this? http://cdn03.shopbecker.com/_resources/_assets/_global/media/processed/00008/resized/fnhwix.CF400020.Toddler-Art-Smock.500.500.fe617c10-f880-4aee-8586-66f84c9ffa65.jpg

Answer

I'd call it a smock also.