That would be a nanometer.
centimeter
0.5
From smallest to largest, it is:yard (yd),meter (m),kilometer (km),mile (mi).
centimetre.
The smallest division on a meter rule, also known as a meter stick, is typically 1 millimeter (mm). This means that each small line or marking on the meter rule represents a distance of 1 mm. The meter rule is divided into centimeters (cm) and millimeters (mm), with each centimeter divided into 10 millimeters. The smallest division of 1 mm allows for precise measurements to be taken using the meter rule.
meter
The smallest unit of length shown. There are 1000 of these in one meter.
Millimeter is the smallest unit among centimeter, kilometer, millimeter, and meter.
centimeter
meter?
The smallest measurement of length with any meaning is the Planck length and this is equal to approx 1.6*10^-35 metres.
0.5
centimeter
From smallest to largest, it is:yard (yd),meter (m),kilometer (km),mile (mi).
An inch is a lot smaller.
centimetre.
Depending on your meter stick, they could represent centimeters or millimeters.