start with a piece of paper 9 1/2"x 7 3/4"
on long side score at 1 1/2", 3", 4 1/2" 6", 7 1/2" and 9
turn to short side and score at 1 1/2" and 5 1/4"
fold on score lines and cut away the two short pieces on the 1/2" score line leaving just the middle piece.
Use your envelope punch board to punch on the score line that is at the bottom or the smallest area ( as shown in the video below)
Mats are 3x1 1/4" and you will need 6 of them.
attach mats to center panels
Put adhesive on top wide panels and then attach to bottom leaving the last panel open just enough to slide the little middle tab in to form the glass.
Cut up on the bottom score lines and then attach together (as shown in the video below)
Any questions please let me know.