My son is a Star Wars fan and I found a tutorial and video for making a Death Star card on Valita's Designs & Fresh Folds blog. The most difficult part was the spacing of the curved lines since most of the other lines are drawn on randomly. I think the card ended up being about a 6" circle. Be sure to check out Valita's video.
Supplies Used: Paper: Basic Gray Ink: Black Accessories: 1 3/4", 1 3/8" and 1" Circle Punches, Ruler, Black Marker, Sakura Glitter Pen, Rhinestones, Dimensionals