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The dimensions for Buzzball and Football.com figures use to be on there sites. Please sse Coach Rip and Reggie rutledge for dimensions on their figures. This is a great concept. Also take a look at some of the many pictures of various teams. There are some figures that have been reconfigured to simulate more action pose that would also help in painting and reconfiguring your Roller Ball figures. Great movie, reminds me of Logan's Run. Good Luck@! You'll find lots of help here
P.S. You have got to talk with Damon Lucus: ForU2hate and Reginald Rutledge. With your creativity and theirs you guys could do many wonderful things together.