Stripy fishermen's smock, denim blue and white stripe, lovely worn soft cotton fabric. White buttons, band collar. Model wearing M/L.
 
Pit to pit sizes for each size available:
Small 20" (like a womenswear UK10/12)
S/M 21.5"
Medium 23"
M/L 24"
Large 25"
L/XL 26"
XL 27"
XXL 28"