The quantum scale is the scale of atoms and subatomic particles. 

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Scales of Size in the Natural Sciences

Feynman, Richard; Leighton, Robert; Sands, Matthew (1964). The Feynman Lectures on Physics. 3. California Institute of Technology. ISBN 978-0201500646. 

The Feynman Lectures on Physics

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The macroscopic scale is the scale of objects and events that are large enough to be seen by the naked eye (without any optical instruments) .

Macroscopic scale

The microscopic scale is the scale of objects and events that can only be seen using a microscope or other optical instrument because they are so small

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