What is the size chart on weed ounce gram 8th?

Size chart as how big the bud will be? its all depending on what kind of weed your dealing with. if you have dank or anything like that the size will be smaller, but on average an eighth will be be the size of a lighter and 1/4 will be 2 times that. its better to weigh it. The weight of an eighth is 3.5 grams and it goes incrementally up.