These t-shirts are made from durable 95% cotton with good stitching. I can't say how they wash because I have to go back. I choose 4T jerseys for my petite 3.5 year old (38"T × 29lb) who mostly wears 3T because I hate buying jerseys. But compared to the t-shirts that are too big for her , they run a lot bigger, my guess is 3T which, although shrinking, will last until next year.
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