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Below are the measurements that correspond to the sizes for our t-shirts. Please note they are approximate shirt measurement and not the 'to fit' size:
Age 1-2 = 22/24"
Age 3-4 = 26/28"
Age 5-6 = 30/32"
Age 7-8 = 33/34"
Age 9-10 = 35/36"
See all in Clothing, Tube Map Collection or Models & toys