Paper size for the chunky policy envelope- 10 1/2 x 12
Score on 12 inch side 3 & 8 5/8
Turn and score 1 1/2 inch on each end
Other sizes 12 x 12 paper score 3, 8 3/4 turn and score 1 inch on each end
6x6 paper
Score 1 5/8 and 4 3/8
Turn and score 1/2 inch on each end
8 1/2 x 8 1/2 paper
Score 2 2/8 and 6 3/8
Turn and score at 3/4 on each end
10 x 10 paper
Score 2 1/2 and 7 3/8
Turn and score 1 inch on each end
https://m.youtube.com/watch?v=QcrN4QldpAU