ajsco Est. Contributor Messages 94 Role Adult BabyDiaper Lover Feb 21, 2015 Size mainly, but the L4's are slightly more absorbent however too large a diaper and it will leak.
SpAzpieSweeTot Daddy's girl through and through! Understood? Est. Contributor Messages 3,171 Role Adult BabyIncontinent Feb 21, 2015 M means medium. L means large