This is a standard size disc. But has a blue LED light built in with 2 standard size button batteries, the larger watch/motherboard sized ones. Because its a LED light the batteries will last a long time, and the light will never burn out. www.4triangles.com or on ebay at stores.ebay.com Need a video made for your products on your website or ebay? Contact me Jay at (773_661-4081 or at ProductVideos4U@gmail.com