I thought I could put this in my gallery...but I can't. It took hours to figure out how to make the folds perfectly on my ScorePal. Turn the card stock slightly and line up both corners on the 8 1/2" side with the 6" line at the top and side and...here you go:
double pocket diag fold card.pdf
My gallery has an Old Olive wedding invitation and this is the fold we used for all 70 of them...I am warning you! It is 12 hours of folding and taping! But everyone has called to ask where we got them.