Pictures won't help you. A month ago I bought an ounce and stored it in my large mason jar for freshness, and it filled up the entire thing. Last night, I bought another full and it fills up only half of the jar this time.

It all depends on how dense the cannabis is, and wetness plays a factor too. Wettish cannabis weighs a lot more than dried as cannabis is 70-80% water.

Pointless story really, but it gives you an idea on how different kinds of cannabis can look muchsmaller or bigger than other kinds.

A scale is your only bet until you get a little more experienced with cannabis. Have him weigh it and show you the weight of the bag on the scale.

If you're not than worried about it, then buy it if you think it looks legit, but technically, it should weigh 14 grams. Now, that is very light in reality, because if you think about it, a candy bar is usually 58-60grams in weight, so a half ounce will weigh much less of course.