A washing device for plus size bras includes a shell which consists of upper and lower shell portions. The upper and shell portions are curved inwardly and may have flat upper and lower surfaces, respectively, such that the height of the shell is less than the lateral dimension of the shell between opposite sides. A hinge permits opening of the upper shell portion with respect to the lower shell portion to insert a bra into the washing device, and a releasable latch mechanism securely holds the upper shell portion and a lower shell portion together during a washing cycle. Preferably, the height of the washing device is about one-half, or less, of the lateral dimension of the washing device, thereby permitting easy insertion into the washing machine.