The phrase "micron scale" refers to something that is very tiny or extremely small in size. It is typically used to describe objects or measurements that are on the scale of one millionth of a meter. Full definition
Pulling apart a sequencing machine - it's mind - boggling with micron scale fabricated elements, lasers, microfluidics etc.. (ashg.org)
«I think of a microscope as something that allows you to image things on the micron scale,» he said. (sciencedaily.com)
Now, they've extended that work by designing a computer - controlled process to not only create dense stainless steel layers, but to more tightly control the structure of their material from the nanoscale to micron scale. (sciencemag.org)