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Place one end of the ruler flat on the floor and position it so it's pressed vertically against the wall. Mark the top end of the ruler with a pencil. Then, move the ruler up so the bottom aligns with that pencil mark and mark the new top edge.  Repeat this process until you’ve reached the mark for your height. It may be easiest to keep track of each individual measurement on a separate sheet of paper so you can easily add them all together at the end. This is the simplest and most accurate way to measure your height without a measuring tape. There are a number of 12 in (30 cm) ruler templates that you can download online and print. Then, use the printed ruler just like a wooden or plastic ruler to measure the distance from the floor to your marked height.  Other than an actual ruler, this will provide the most accurate measurement of your height. There are also ruler apps that you can download to your phone if you don’t have a printer accessible. A dollar bill in the United States is 6.14 inches (15.6 cm) long and 2.61 inches (6.6 cm) tall. Press the bill flat against the wall and slide it down so one short edge of the bill is flat against the floor. Mark the top edge of the bill on the wall with a pencil. Move the bill up so the bottom edge is now flush with your original mark, then mark the new height.  Continue until you’ve reached the mark you made recording your height. You may need to use the height of the bill—2.61 inches (6.6 cm)—to measure the final few inches of your height. You can also fold the dollar bill in half to measure approximately 3 inches (7.6 cm), or in quarters for 1.5 inches (3.8 cm). A standard sheet of letter paper is 8.5 inches (22 cm) wide and 11 inches (28 cm) long. Use this sheet of paper to measure the distance between the ground and the mark you made by the crown of your head. Fold the paper in half or in quarters to create more precise measurements, which you can mark with a pencil to create a makeshift ruler. Make sure you’re using a standard sheet of printer paper. Other sizes of paper have different dimensions. If you know your shoe size, you can roughly translate that number into a measurement. Look up a sizing chart online to estimate the length of your foot based on your shoe size. Then, place your foot on a sheet of paper and mark the distance. Use this to measure the wall between the floor and your marked height.  For example, with European shoe sizing, size 35 is roughly 9 inches (23 cm) and 40 is 10 inches (25 cm). You could also cut a piece of string the size of your foot, then use the string to measure the distance from floor to marking.
Measure the distance from the floor to the mark with a ruler. Print out a ruler for a more accurate makeshift measuring tool. Use an American dollar bill to measure the distance to the mark. Create a makeshift measuring tool with a piece of printer paper. Translate your shoe size into inches or centimeters.