One-way flow breaks down the moment someone walks in through the out lane. Where a plain 'Exit' marks the way out, 'Exit Only' adds the restriction: this lane is for leaving, full stop. Post it at a checkout exit, the outbound side of an entrance, or a one-way aisle, and pair it with an 'Enter' lane to keep traffic moving in a single direction. It is a flow-control message, not an emergency or code exit sign. The graphic is a pre-printed, single-sided paper insert for Lavi Post-Top Stanchion Sign Frames, sold separately, offered in landscape sizes 5.5x7, 7x11, 8.5x11, and 11x14.