I made a wall hanging for my GDs wedding. I ironed freezer paper to the back of white cotton and cut it into
2 1/2 " x 5" pieces. I provided some #5 Micron black pens for the people to sign the pieces. I cut blue and gray strips to intermingle with the signed pieces. Turned out nice. I would suggest you have someone at a table to show the guests how to sign the strips and make sure they don't walk away with the pens.