The units are ordered smallest to largest from top to bottom: Picometer (pm) = 1 x 10⁻¹² meters Nanometer (nm) = 1 x 10⁻⁹ meters Micrometer (um) = 1 x 10⁻⁶ meters Millimeter (mm) = 1 x 10⁻³ meters Centimeter (cm) = 1 x 10⁻² meters Decimeter (dm) = 1 x 10⁻¹ meters Meters (m) = 1 meter Kilometers (Km) = 1 x 10³ meters
