Isaac @ 6 weeks, approx. 6.5 lbs
wearing a size 1 Thirsties Duo with a Kissaluvs fitted size 0 underneath
(part of the Newborn Diaper Rental package)
Baby Girl K. @ 9 months, 15.5lbs
wearing a Thirsties Duo size 2 over a WAHM fitted
even though she is under the 'starting' weight of the Thirsties size 2 (advertised as 18lbs), you can see K. still has a great fit through the legs and waist!