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

Wikipedia

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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