Numbers with units can be entered directly on the command line. Just put the unit abbreviation after the number. mm for millimeters, cm for centimeters, m for meters, etc. Rhino will automatically convert the units as needed. Just make sure to put the abbreviation behind each number. For a point at 2.5 millimeters, 10 millimeters use 2.5mm,10mm (not 2.5,10mm). You can also mix units in an entry.

https://docs.mcneel.com/rhino/6/help/en-us/index.htm#documentproperties/units.htm?Highlight=units

Available units:

Use any of the Rhino unit measurements including fractions. You can mix fractional and decimal input.

##### Microns

1.2mic

1.2micron(s)

##### Millimeters

1.2mm

1.2millimeter(s)

##### Centimeters

1.2c

1.2cm

1.2centimeter(s)

##### Meters

1.2m

1.2meter(s)

##### Kilometers

1.2km

1.2kilometer(s)

##### Microinches

1.2microinch(es)

##### Mils

1.2mil(s)

##### Feet and Inches

1"

1in

1inch(es)

1’2-1/2(")

1’2.2(")

1-1/2"

1.5"

1’

1ft

1foot

1feet

##### Miles

1mi

1mile(s)

##### Other

Angstrom

Nanometer

Decimeter

Dekameter

Hectometer

Megameter

Gigameter

Yard

Printer point

Printer pica

Nautical mile

Astronomical unit

Lightyear

Parsec