All jeans have an adjustable waist. The majority of reviews say the rainbow threads jeans run small/snug (most size up a size). A child approx. 20 lbs. 29" (shown in photos in green shirt) usually wears 12 months, is wearing 18 months in the photos snugly, and should have gotten the 2T. Another child that typically wears a 4 prefers size 5.
They are our Pipperdoodles brand. Each pair is hand cut, sewn, and then hand-distressed so each pair can be slightly different. Some of the photos were taken in the sun so appear lighter but the rainbow is darkly dyed (like photo of them laying flat).