This is the classic Alpha MA1 jacket now available in larger sizes (3XL and above).
As an approximate guide, the 4XL measures 34'' from armpit to armpit across the front with the elasticated waistband measuring from 22-28'' across the front. The 5XL measures 36'' from armpit to armpit across the front with the elasticated waistband measuring from 24-31'' across the front.
Please see the
main MA1 product page for sizes below 3XL and for further information on this jacket.