I was afraid the ring would not fit for being too small,  but actually it turned out to be big enough to fit my thumb comfortably. So it was slightly bigger for my middle finger, but it did the job. It wasn't a problem even when there was dancing. It lights up nicely. There was was some flickering of green light for a moment, but it got back to being stable. Overall its worth buying to me if you are going to be the green lantern.