Ladies Polo Ralph Lauren Blazer Measurements are as : 17 1/2 inch Pit to Pit When laid flat & buttoned up pit to pit. From shoulder to cuff 61cm. & From the top of collar (at the back) to hem the length is 64cm.. Ralph Lauren being American it’s a US 6 as can be seen in the label. However a quick Google search will tell us US 6 equals UK10 34” or 86cm Bust. which confirms my pit to pit measurement.. Hopefully this helps BUT IF YOU REQUIRE ANY MORE MEASUREMENTS OR INFORMATION DO NOT HESITATE JUST ASK Has Been Worn BUT is Fresh From Dry Cleaning. Smoke Pet Free. Royal Mail 2nd. Signed For