Shirt measurements are approximately as follows:
S: W=40cm/L=60cm, M: W=43cm/L=63cm, L: W=46cm/L=66cm, XL: W=50cm/L=67cm, XXL: W=54cm/L=72cm
(W=width measured across chest / L=length measured down the back)

06/07 season's Recreativo shirts are roughly one size smaller than the current season's.