Your bones keep growing until you are in your early 20's.
But did you know that you are about one centimeter shorter in the evening than you are in the morning? This is because your spine gets a bit squashed as you walk around during the day.
Your spine isn't all hard bone, there are soft bits in between each part of your spine.
These soft bits are called cartilage and it is this cartilage that gets squashed.
Measuring bones
Measuring bones