Well, when you get it, measure it on your own scale, taking into account the weight of teh actual bag if you want to be specific with it. From there, depending on the weight, thats up to you. I suppose it would depend on how good of a friend he is. I mean, if a friend was hooking me up, I wouldn't mind if he got a (very)small bit for himself as long as he told me. A little bit of weed is no reason to ruin a good friendship. Now if its someone you know more as an aquaintance than a true friend, feel free to do whatever you wish.

On the other hand, if he pinches some off without any mention to you, what kind of friend would do that?