Here are the dimensions of the clicker coat:
size          chest (armpit to armpit)       top of collar to hem     sleeve length (to end of cuff)
S               24                                                       33                              35
M               25                                                        33 1/2                        36
L                26                                                        34 1/2                        36                     
XL              27                                                       34 1/2                        36 1/2
2X              28                                                       35                             37 1/2
3X              30                                                       36                              38
4X              31                                                       37                              40
5X              33                                                       38                              41