The game board from the Ed-U-Cards set is essentially the same as the Red/Blue Backs board. It's a tri-folded (in both directions) sheet of paper and I only have the EUC version which measures roughly 2 5/8" x 2 15/16" folded (fold is not perfect) and 7" x 8 9/16" unfolded.
Thanks for the book plug guys and it can be d/l for free here:
https://archive.org/details/ModernGu...blishedCopy2.2
Please note I am working on a second edition which will have a
lot of updates and corrections. It may possibly be done this year (still awaiting two or three things I'd like to include) but more likely next, as I want to have it out before the 2025 National.