If I tell you where the bubble came from...I'd have to do an Achmed the Dead Terrorist on you.
The bubble is a good inch taller, so it accomodates figs like this Batman as well as Andorian. However, it is not wide enough for Hulk-style figs. The Superman I made over the weekend will not fit in it
The card itself has full backside art in classic Kresge-style and is punched with my custom tools.