No smallest, only smaller.😎😎Many moms want a lighter breast pump, so our M1 model has shrunk the size of the wearable pump to another level with the motor-cup uni-body design, which may be lighter than the apple you eat every day. Smaller size, smaller sound, yet larger 3 modes and more 19/21/24/27mm flange choices, a real gadget starts small, yet finishes big. A good “bosom friend” is always there for you no matter at home or outside, and so do we.🥰🥰