I will reply in English, to make sure I do not make any mistakes.
I don't remember anything about the envelope, other than that it was legal size. It was handed to him as they were rising and we were leaving. I didn't pay particular attention to it. It never struck my mind that it was particularly thick, if that's what you're asking. I don't have a precise recollection. This was, after all, a good number of years ago.