Scale or scales may refer to: Mathematics Scale (descriptive set theory), an object defined on a set of points Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original Scale factor, a number which scales, or multiplies, some quantity Long and short scales, how powers of ten are named and grouped in large numbers Scale parameter, a description of the spread or dispersion of a probability distribution Feature scaling, a method used to normalize the range of independent variables or features of data Scale (analytical tool) Measurements Scale (map), the ratio of the distance on a map to the corresponding actual distance Weighing scale, an instrument used to measure mass Scale (ratio), the ratio of the linear dimension of the model to the same dimension of the original Spatial scale, a classification of sizes Scale ruler, a tool for measuring lengths and transferring measurements at a fixed ratio of length Vernier scale, the scale on calipers Music Scale (music), a sequence of ordered musical notes Scale (string instruments), the sounding length of the strings of an instrument Scale (album), a 2006 album by electronic artist Matthew Herbert "The Scale", a song from Our Love to Admire by Interpol Musicians scale, the pay scale set by unions of musicians Science Biology Scale (anatomy), a rigid plate which grows out of the skin of various animals Scale (dermatology), a secondary skin lesion in humans that resembles animal scales Scale (insect anatomy), a feature of the wings of moths and butterflies Scale, a type of trichome, any flat epidermal outgrowth in botany Bulb scale, the storage layers of a plant bulb Scale insect, a waxy coated animal that resembles a fish scale Chemistry and materials science Fouling, sometimes called , a buildup of unwanted substances on a submerged surface Limescale, a hard, chalky deposit that often builds up inside kettles, hot water boilers, and pipework Mill scale, the flaky surface on hot rolled steel, consisting of iron oxides Scale (chemistry), the range of mass or volume of a chemical reaction or process Other sciences Scale (analytical tool), a concept in the study of complex systems and hierarchy theory Scale (social sciences), a tool for ordering entities by quantitative attributes Places Scales, California, a community in the United States Scales, Lancashire, part of the village of Newton-with-Scales Scales, near Kirkoswald, Cumbria, a hamlet Scales, South Lakeland,