You have a very thin waist. They left a red mark on my 1 month old daughter's tummy. She is 11 pounds. and I received size 3-6 months. The length is perfect. I took a pair of scissors and cut the elastic at the side seams to make room for the belly. I don't know how long that will take. I paid less than $4 when I bought mine. I would be more annoyed if I paid full price.
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