Question Asset measurement Spec

[LubaFoto]

Is there a way to have some sort of a ruler or a measurement guide in unity, if I am looking to create something with real world Specification?
Exemple: Olympic barbells pole, weight standard length and size.

Thank you in advance.

 

[MacGruber]

Units in Unity are in meters. Also the standard cube mesh in Unity is one meter on each side. If you scale it by 1.42 on one axis, it would be 142 centimeter.