We make about £5 from T-shirt sales... but we made sure not to buy the cheapest... Good quality, many-times-washable, 100% white cotton. They're not organic, but apparently fairly traded... Bizarrely they all cost the same, no matter the size, EXCEPT for children's which, also bizarrely, are more expensive. We've put them all at the same price of £15, 2 shirts for £25...