10. This is very clear on any standard ruler
yes
centermetre
There are 100 square millimetres in 1 square centimetre.
centermetre stick
There are approximately 0.39 inches in a centimeter.
There is 0.1 cm in one mm.
25.4 mm in one inch.
304.8 mm
2 centermetre
One inch is exactly 25.4 mm.
one tenth of a milimeter
One million mm.