
I bought this when my LO was born to wear in the winter but my little one was growing up so fast (had been wearing 12 month clothes by the time he was 4 months old ) that it didn't suit him when he stopped diapering and it was cold enough for him to wear it. So you need to buy a medium size. This is a plush sleeping bag with a thick lining. This is only suitable for your child in winter or when your house is very cold due to the air conditioner. My future baby linebacker sleeps in a Nested Bean Zen sleeping bag but his hands and feet are cold in it despite wearing my fleece pajamas. That's why I ordered it in a size larger. updated 09/11/20. The little man wears it at night and for both daytime naps continuously since I bought the medium size 8 months ago. I'm always hot so I leave the AC on all summer and the rest of the year the heat is cooler at night. Holds up well but the zipper is starting to wear out with frequent use. I buy a medium size 2 for this reason, and also to have a second one if it needs to be washed. Low temperature drying takes a long time to dry. My LO is 12 months old (still huge), size 2T, 31.5 inches long and 29 pounds.

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