I ordered these for my seven month old. They fit fairly well and are easily adjustable. She doesn't seem to mind wearing them, she rarely messes with them. My two and a half year old niece likes to "borrow" them and they fit her too, so they really are very adjustable. The only thing I don't like about them is that they leave a big red mark across her nose, eyes, and forehead when they're tight enough to stay on. If I make them any looser, they get out of place on her face. I think this bothers me more than it bothers her and maybe it's unavoidable with this style of glasses.