I know this might sound a little stupid ,but I am not sure how to find out the measurements of a suit that I am going to sell. I have a dolce and gabbana suit that I am looking to sell made in italy. It was a hand me down so I do not know the measurements all I did was try it on and it fit. On a tag it says the number 50 and I dont really know what is that referring to? Can someone please help so I can help the consumers know the product I am selling a little more because I am clueless about suits.