Abstract: A hand warming device for warming a hand of a user gripping the device may comprise a housing having an exterior surface, a heating element to heating the exterior surface, a power source, and a power switch. The exterior surface may be contoured to facilitate contact between the exterior surface and the hand of the user when the housing is held by a clenched fist of the user. The housing may be elongated along a first axis between opposite first and second ends. The exterior surface of the housing has a shape having a longitudinal profile taken in a longitudinal plane extending along the first axis. The longitudinal profile may have an inner boundary and an outer boundary extending between the ends, and the longitudinal profile may be generally comma-shaped.