7 grams is 1/4 of an OZ. its impossible to tell my looking at it: some weed is fluffy, some solid, some gets compressed and sometimes u get cunts trying to sell u wet weed. Buy some scales off ebay they are like 15 bucks and then u know whos ripping u off. also its a good idea to let the dealer know u have scales as then if he is a cunt he is less likely to rip u off. I tend to let them know that if they rip me off, i wont stand for it. Id grass a fucker if he ripped me off bigstyle or certainly threaten him with it. dont stand for shit!