Common nail sizes

We don't use nails near as much since deck and drywall screws became popular but the graphic is nice, maybe it would look good on a T shirt.
 As a side note, although you get more 6d nails in a pound than with 10d nails, go with bigger ones when building a tree fort. It's lesson I learned as a kid, spending my meagre allowance for supplies at the hardware store...