Exemplary methods and systems for dispensing soap sanitizer or lotion as a function of hand size are disclosed herein. An exemplary dispenser for dispensing a soap, sanitizer or lotion includes a housing, a processor in the housing, a reservoir for holding fluid, a pump for pumping the fluid and a sensor for sensing a parameter that is indicative of the hand size. The exemplary dispenser also includes circuitry for determining a dose volume of fluid to be dispensed as a function of the sensed parameter that is indicative of a hand size and circuitry for causing the pump to dispense the dose volume.