12.9 oz
Like one ounce of anything, it will weigh exactly one ounce.
One ounce!
Just about one ounce ;-)
One ounce would weigh one ounce.
One ounce
One ounce. Most likely much less.
They weigh one troy ounce.
I have small screwdrivers that weigh about one ounce.
I'm going to guess you mean an ounce? In that case, you can't really weigh an ounce. An ounce in a unit of measurement. There are 16 ounces in one pound so hopefully that gives you an idea of how much one ounce is!
That is approximately 29.574 ml.
one ounce
One ounce or less