Human-scale is important mostly because it can vary a lot. Furthermore, you can not make objects like tables only with one size. Thus, the dimensions should be appropriate to the body type. For instance, if you plan to make or buy a tall table, firstly you should know why you need it. If you need it for doing something precise and detailed, you need taller one, But if you need a table for eating on foot, it should be between 75-90 cm.
Human-scale Dimensions for Everyday Objects
For more examples and dimensions, see the pictures in this post. At last, you can click the link underneath.