For these designs:
Blue or Olive Che Viva, White-Che Comrade, Navy-Star Viva, White-Hasta la Victoria siempre – the sizings are approximately as follows:
XS/Youth (9-11 yrs) – 88cm/34″
S – 92cm/36″
M – 102cm/40″
L – 106cm/42″
XL – 112cm/44″
XXL – 120cm/47″
For these designs:
Red-Che, Olive-Another world is possible, White-Love Cuba Hate the Blockade, White-Cuba Solidarity Campaign, Grey-Che hasta Siempre, Black-Che Comrade, White-Fidel & Che – the precise measurements of the tshirt laid flat are as in the picture below.