Small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS) make up a sub-family of small-angle scattering (SAS) diffraction techniques suitable for probing the size, shape, ordering, and interactions of molecules and molecular assemblies on length scales that are typically from around 1 nanometer (nm) to a few hundred nm. This size range overlaps with the lower range probed using the laser light diffraction technique (see Analytical Methodologies Based on Scattering Phenomena—Light Diffraction Measurements of Particle Size 〈1430.2〉).