Nicholas:

Height 174cm

Chest 89cm

Waist 76cm

Hip 94cm

Wears size Medium

Nicholas has gone with a relaxed fit for his tops. For a more fitted look, he could have gone with size Small for tops. 

Male warm up top is a bit more fitted, size up if in doubt.

Lucas

Height 151cm

Chest 74cm

Waist 65cm

Hip 81cm

Wears size 12K

Lucas has gone with a comfortable fit for his tops that is neither tight nor too relaxed.