No, I have no idea of the size.
I've only seen a still on Free Republic.
Where's the launch video and at what point did the insulation break loose?
There is a question in my mind about this. TV is showing a photo just as the shuttle is lifting off the pad with an area circled, yet they are saying 80 seconds after lift-off. There is no way that the gantry would still be in the picture 80 seconds into the launch.
Check this video here. This looks more like 80 seconds into launch.
Earlier they showed the video taken by the Australian astronomer when Clombia was passing over the California/Nevada border.