Firts of all gather your materials!

(I didn't really know the proper name of what I call hole punch stickers, but I think you will know what I mean when you see them. They are in the yellow box.)

Cut a length of tape measure which fits over your head from ear to ear. (The place where a normal hair band would sit.)

At each end, punch a hole at least half a centimeter away, otherwise it will break.

Cover each hole with a hole punch sticker. These make it stronger.

Next, measure a length of elastic which is long enough to connect the tape measure around your head. Then double it, and add an inch to allow it to be tied.

Then thread one end of the elastic through one hole from the outside - in. Repeat this on the other side...

... so it looks like this.

Pull each end through...

...and tie up, making sure it fits snuggly around your head.

And there you (should) have your cool new headband.

If you have any questions, or I have made no sense, please just say!