I bought these for a 2 year old (size 5) who is 3.5 years old (I wanted room to grow). They are large enough to be worn backwards (he takes off when he reaches the zipper). When your little one is full or chubby they are likely to feel cramped - order 2 or 3 sizes up. They don't seem to shrink in the wash and dry and the zipper holds up well. Almost feels like a cotton T-shirt, the elasticity has not yet been studied, and the thickness is as thin as a cotton T-shirt. 1 year. A size 3T can still fit a child (but maybe for another 2-4 months) and the zipper, the fabric and even the non-slip dots on the legs wear well with minimal shrinkage. Size 5 was bought this year because she is growing fast.
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