Hello, I have a question about European sizing. I have several shirts that all have somewhat different numbering. I'm not sure if these correspond to chest measurment, or neck. For example: Etro shirt: simply marked 39, I assume this to be the neck in CM Versace V2 shirt: Marked 15/38, again, I assume this to be neck in inches/neck in CM Versace Couture shirt: Marked 48, not sure what this means D&G shirt: Marked 50/36, no clue about this Dolce & Gabbana crew neck: Marked 38, is this chest size? Dolce & Gabbana pants, marked 48. Can someone please explain?