I wear a 46s or 48s depending on the cut here they use a basic measurement s,m,l,class etc. I originally ordered a xxl was way to big so went to a xl and fit was perfect in shoulders. Had mid section brought in about 1in and had to have sleeves shortened by 1/2in now looks good! It's a linen material so by nature it will wrinkle a bit easier but they will mostly come out just by hanging up the jacket. Only a few need a bit of steam to get the wrinkles out.
Grass Valley, CA