We describe a novel application of subtyping in which a small orthogonal set of structural subtyping rules are used to capture the notion of scaling—an unusual variety of polymorphism found in APL-like languages which is attracting renewed interest due to its applications in data parallel programming. The subtyping approach allows us to provide a simple coercion-based semantics for a generalized interpretation of scaling that goes well beyond what is available in APL dialects.