Can't figure out what size t-shirt to get for your little 'un, no problem, have a peek at the size charts below and that should give you a good idea what to get. We always find that everyone has their favourite t-shirt in the wardrobe so a good guide would be to go and get that, lie it out on the bed and measure it. Compare it with our size charts below and Bobs yer Uncle, you should know what to go for.