If one plans to sell more than a few items, I think it's worth the expense of buying a fairly accurate scale to weight items -
Then one can check the postage rates before leaving the house.
There seem to be several electronic ones available for between $20 and $30.
Mine goes up to 4 pounds and weighs in 0.1 ounce increments - but if there are a lot of items, one can weight them separately and add.
The only time I am "not confident" is when the items are "right on the line" for weight. When it's 6.1 ounces, I just round up to
7 - but when it's EXACTLY on 7 - and I haven't put the label and tape on it yet - then I will round it up to 8 ounces.
I'm now thinking I should have kept those boxes - but the box they came in was big and bulky - and I was in cleaning mode at the time. :roll: :cry: