1) Measurable in microns 1) Tiny 
[journal] Nanoscale is a peer-reviewed scientific journal covering experimental and theoretical research in all areas of nanotechnology and nanoscience. It is published by the Royal Society of Chemistry. According to the Journal Citation Reports, the journal has a 2012 impact factor of 6.233. ...
(from the article `Physical Sciences`) As more consumer products included nanoscale materials—materials manufactured from particles 1 to 100 billionths of a metre in size—researchers ... the manipulation and manufacture of materials and devices on the scale of atoms or small groups of atoms. The `nanoscale` is typica...
Between 0.1-100nm.
nanoscale 1. Relating to or occurring on a scale of nanometers. 2. Referring to extremely small dimensions in the range of 100 nanometers or less, or to materials or objects existing at this level.