Unit of length(strength) and load(weighting)

Hi.
I don’t know “unit of length(strength) and load(weighting)”.
I guess:
strength→[N/mm]
load→[N]
or
strength→[kN/mm]
load→[kN]

Please help and teach me!!!

Thank you! Units of Rhino is [mm]. Even in that case Load is in Newtons and Strength for Length goals (springs) is EA/L ?