I am a small adult female and these are the perfect size for me. They don't take up a ton of room to store in a bag or purse, nor do they fall off or take over my whole face; but they are still full enough to look good and provide adequate coverage. I have a pair of Oakley "Script," and these are a similar shape, just MUCH smaller in size.
As a word of caution, in terms of the size, these really do appear to be kid-size glasses to me. They would far too small most people older than 11 or 12--that is, unless they have a small face. They look ridiculous and/or just don't fit on several other adults who have tried them.