Miniaturization of the active electrode area of sensors for voltammetric analysis from the common mm to the low micrometer scale or below leads to improved signal-to-noise ratio for analyte detection and also facilitates spatially resolved measurements. Varied for micro- and nanoelectrode construction may be the geometry of the detecting surface and the surface material. Decreasing voltammetric cell volumes from milliliter to micro- to picoliter levels is, on the other hand, driven by (1) ‘Green Analytical Chemistry’’ concerns for chemical waste prevention/minimization and the related motivation for responsible use of chemical resources, (2) budget-related needs to handle very expensive redox-active compounds economically and (3) the requirement to analyze samples that are obtainable only in small quantities. A main group’s interest is the establishment of innovative fabrication methodologies for miniaturized sensors with the potential for applications to routine laboratory electroanalysis. Developed procedures should match the requirements of marked simplicity and cost effectiveness in order to promote widespread applications, especially in laboratories with limited budgets and no access to modern micro-/nanofabrication facilities. Targets of research efforts are exceptional graphitic carbon micro- and nanoelectrodes and special metal versions as, for instance, copper microelectrodes in single or arrayed miniaturized electrode layout.