The grey 100% organic cotton Big Moon T-shirt features an image of the far side of the moon. Because the moon is tidally locked, meaning the same side always faces the Earth, it was not until 1959 that the far side was first imaged by the Soviet Luna 3 spacecraft. These images from 2011 show the far side of the moon in increased detail.
The Big Moon t-shirt is available in the folowing sizes:
Extra Small: 48 cm chest, 66 cm length
Small: Chest: 50 cm chest, 68 cm length
Medium: 53 cm chest, 70 cm length
Large: 56 cm chest, 72 cm length
Extra Large:60 cm chest, 74 cm length
Designed for the Science Museum's Cosmonauts exhibition. Moon image ©NASA