The size as it's indicated on the label is size M.

My measurements:

Armpit to armpit seam to seam is 24.3"(61,7 cm).

Shoulder to shoulder taken from the back! of the garment is 22.3"(56.6 cm).

Back length is 34.35"(87.5 cm).

Made in Italy.

Retailed at 450£.

Any questions about this item,please,ask.