The designation “O/S” when referring to attire usually signifies “One Measurement.” This implies the merchandise is designed to suit a spread of physique sizes, usually achieved via stretchy materials, adjustable closures, or a relaxed reduce. For example, a hat labeled “O/S” ought to comfortably match most grownup head circumferences, whereas a pair of leggings would possibly stretch to accommodate varied waist and hip measurements.
The adoption of a single-size possibility can streamline stock administration for retailers, lowering the necessity to inventory a number of sizes of the identical product. This simplification additionally advantages customers by eliminating the guesswork concerned in choosing the proper dimension on-line, doubtlessly resulting in elevated gross sales and buyer satisfaction. The idea emerged alongside the rise of mass-produced clothes and the necessity for environment friendly sizing options.