Shirt measurements are approximately as follows:
1st shirt adult M: W=57cm/L=71cm, L: W=59cm/L=75cm, XL: W=61cm/L=76cm
2nd shirt adult M: W=54cm/L=79cm, L: W=56cm/L=80cm, XL: W=59cm/L=80cm
(W=width measured across chest / L=length measured down the back)

06/07 season shirt measurements are approximately as follows:
3rd shirt adult S: W=47cm/L=67cm, M: W=49cm/L=70cm, L: W=51cm/L=73cm, XL: W=53cm/L=75cm, XXL: W=cm/L=cm
The 2nd shirt is slightly smaller than the 3rd.