Very small, pic really blows them up. After opening box I was gonna return them directly. They were so much smaller than I had needed and they seem very cheaply made BUT for that little of a price they are not gonna steal the show for looks but they do produce alot of light for such a small device. So I've kept them but plan to integrate them into one of my projects where I need lights and they won't be showing. So now u know what ur getting, small but DO produce a good light source,it's cool if that's gonna work for u.