We know they call it the great outdoors, but designing a super-sized space for your outdoor room may not be the best way to go. A large area and the absence of walls can be refreshing, but it can also make you feel exposed. The space can seem impersonal. Outdoor room plans that have at least one solid (or semi-solid) wall help anchor the space and make it feel more substantial. A room size that roughly mirrors the size of your indoor living room will be big enough for your family but small enough to feel intimate and inviting.