Micromachines (ISSN 2072-666X) is a peer-reviewed open access journal on the science and technology of small structures, devices and systems, published monthly online by MDPI. Micromachines is indexed in EI, Scopus, PubMed and SCIE (Web of Science), and has an Impact Factor of 2.891 (2020). Micromachines boasts a fast peer-review process and online publishing of original results. Manuscripts are peer-reviewed and a first decision provided to authors approximately 13.3 days after submission; acceptance to publication is undertaken in 2.7 days (median values for papers published in this journal in the first half of 2021).