Pinch the crease with your thumb and index fingers and run them along it to make it more firm. To make the crease even firmer, you can unfold the 2 halves, turn the paper over, and fold them again. This will create a defined crease along both sides of the paper.
You will only need to 1 strip to create 1 paper football. If you like, you can use the other to create another football later. Use scissors to cut your paper into 2 pieces whenever possible.
Press the crease down after lining up the corners. Place the half horizontally in front of you when you’re finished—the piece should now be half as wide and twice as thick.
Press down on the top and right creases of the new triangle.
Give the last creases a good rub once you’re left with 1 triangle.
The end result should be a square (or rectangle) attached to a right-angled triangle.
Don’t worry if it’s not a perfect triangle—it takes practice to get it right.
At the end of this step, your larger right-angled triangle (created from 2 smaller triangles) should now be the same size as the smaller ones but with double the thickness.
Brown markers make a great color for football leather, and white or gray works well for the stitches.
