A semi-rigid electronic device is disclosed that includes a flexible panel and a housing. The housing may have a physical dimension L, such as length, height, or a diagonal. The minimum bending device radius of the device along the dimension L may be L/pi when held at an edge. The bending radius increases the more rigid the device. The housing, electronic components, and display may each contribute to the flexibility of the overall device. The housing and/or the flexible panel may also include one or more ribs to constrain movement of the semi-rigid device.