The present invention provides an adjustable attachment comb for use with a hair cutting device (16), where the adjustable attachment comb includes a stationary comb chassis (12) that is configured and arranged to be removably attached to a hair cutting device (16) and a movable comb body (14) that is configured and arranged to be adjustably attached to the stationary comb chassis (12) in one of a plurality of predetermined settings. The movable comb body (14) and the stationary comb chassis (12) cooperate to form a complete attachment comb unit (10). To supply the adjustment feature, a plurality of adjustment formations (26) are located on the stationary comb chassis (12), and at least one cooperating adjustment formation (24) is located on the movable comb body (14). The movable comb body (14) can be releasably secured upon the stationary comb chassis (12) in one of the predetermined settings by a mating interaction between one of the plurality of adjustment formations (26) and the at least one cooperating adjustment formation (24). One of the predetermined settings may be selected whether the attachment comb unit (10) is in an attached state or an unattached state with respect to a hair cutting device (16), and whereby the selected predetermined setting is maintained even after the state of the attachment comb unit (10) is changed from an attached state to an unattached state and vice-versa.