It was the biggest I have ever seen. It was very bright and it was so fast, I couldn't even count to 1. It was the fastest thing I have ever seen. The only thing I could think to describe the size of it would be the size of the quotations spaced out like I have here- ( ) It looked to be an oval shape with a slight indention to the rear of it. It was amazing from what I got to see in that short spurt.