you can do this my measuring with a ruler or slightly folding the paper in half. but do no create a crease. find a pair of glasses you wear; sun-glass, reading glasses (they must fit) place the piece of paper on a flat surface. take the glasses and place the middle nose bridge in the center of the paper. make a mark where your eyes would fit. draw an eye. slightly fold the paper in half. place it up to your face measure where the bottom of your nose is. make a line on the paper. you are close to making some cool art. take a pencil or pen and 