I don’t know how tall I am; what should I do?
Don't stress. Hardly anyone knows how tall they are.
A standard door 🚪is just over 2 metres (210 cm) high, so you can use that to measure yourself. Grab a pencil ✏️, stand next to the door, and mark where the top of your head is on the door.
Now measure from the floor to the pencil mark with a ruler or measuring tape 📏.