Cut 13" strips of tulle. You could measure each piece of tulle at 13" intervals and cut, but that takes a lot of time.
To speed up the cutting process, I found a box that had 13" flap. Wrap the tulle around the flap, clipping it in place. Then cut the tulle at the edge of each box flap to get a lot of 13" tulle strips very quickly.
I have 2 children both of which go to University. I spend most of my time crafting. I like to make origami, 3d paper projects, greeting cards and lots more. I mostly work with my Silhouette Cameo, Curio and Mint.