<p>For this reprint we intend to cover theoretical as well as experimental works performed on small scale to predict the material properties and characteristics of any advanced and metamaterials. New studies on mechanics of small-scale structures such as MEMS/NEMS carbon and non-carbon nanotubes (e.g. CNTs Carbon nitride and Boron nitride nanotubes) micro/nano-sensors nanocomposites macrocomposites reinforced by micro-/nano-fillers (e.g. graphene platelets) etc. are included in this reprint.</p>