u need scales, and u shouldnt think of it in 8ths and oz wen ur servin up think in grams. and wen u know ur clientel u can gage wt 2 giv peeps, 3.5 being a nice standard 8th but u can giv like 3.2 2 minors hoo dont know any better , and if uve got a nice oz and a customer hoo u deal 2 quite u can top them up and giv em 3.7 which theyll appreciate it and spread the wrd 2 like minded peeps. hope dis makes sense cos iim reallly stoned. l8erz