please read . the label size is S (46) the pit to pit measurement is 26"
I wear a Medium and chest size 38" I have one of these and S fits me perfectly
now for the description if interested
The Diesel Men's black jacket J-BOY GIACCA is a stylish mid-length quilted jacket. This jacket features a button closure, quilted accents, lined interior, and pockets for added convenience. With a chest size of 46 inches, it is designed for a casual occasion and is suitable for autumn, winter, and spring seasons. The black colour and regular fit make it a versatile and fashionable choice for men's outerwear.