These iconic tees are available from River Island in collaboration with War Child (and WornFree). The original design was first worn by John Lennon back in 1971. There are three other versions in the range including a faded blue mens version the exact design as Lennon wore and a faded pink girls tank vest. I bought this mens one in size XSmall which is the equivalent of a size 10-12. Tshirts retail at £18 with profits going straight to War Child, an incredibly important charity that takes care of vulnerable children caught up in horrendous wars.