I am selling 4 bars and each weighs 5 grains. Each bar weighs 5 Troy grains. Precious metals like silver are sold by Troy oz which consist of 480 grains or 31.103 grams.Selling it in these small quantities allows everyone to buy precious metals. The advp oz has 29 grams. That is the measurement Mom uses to weigh cooking items on. You had no reason to know this so dumb is not appropriate. Thanks for looking at my auction and feel free to ask any questions you like.