Publisher Summary Ubiquitous computing user experiences come in all shapes and sizes. With computation distributed into mobile devices, buildings, and roads, the experience of devices and spaces is no longer limited to what can be held, seen, or inhabited. This presents a fundamental challenge to assumptions that designers are only responsible for scoping interaction at single scales with single objects. Certainly some designers and some designs try to consider a device or interaction in context of the other devices, spaces, and networks it touches. But situating the design of user experience within ecology of spaces, devices, and audiences from small to large scales of interaction has never been necessary. Though scale fundamentally affects the user experience, there are few guidelines for designing at different scales. Interior design has focused on body-scale experiences, interface design has (largely) focused on design for computer monitors, and industrial design has focused on how hands manipulate objects. No one discipline teaches a design framework that covers the continuum of all the scales of interaction in our immediate live environment.