An orthopedic device in the form of a circumferential walker includes a first member (posterior shell) and a second member (dorsal shell) corresponding to the first member. An outsole or plantar shell portion is attached to, or formed on or with the posterior shell. An expansion joint is positioned in the posterior shell or dorsal shell to expand to accommodate larger sized lower legs. The dorsal and posterior shells may include flexible or resilient edge portions to reduce pressure points and to further accommodate users having larger sized lower legs. The dorsal shell also includes a flexible or resilient connecting portion to accommodate users having larger ankles and feet and to reduce or eliminate the formation of a pressure point along the dorsal shell. Quick-connecting buckle assemblies can be provided to allow a user to quickly don and doff the orthopedic device.