Originally posted by: TylerBarnes
Thank you for the advice and input! The 5oz is an over estimate. I measured right under 4oz (3.951oz) on my new mailers and about 4oz (4.002oz) on some old envelopes I have with thicker bubble padding. I called it 5oz cause it is well above so I don't have a chance of going over accidentally. I'm buying labels through paypal and printing them out so I need to type in my weight estimate accurately. But there is a lot of extra length I could cut off and tape shut. I wonder if I could keep all of them below 4oz enough to use that instead if the price is affected by a decent enough amount.
At least for Canada there is a significant difference for above 4.1- 8oz and below 4 oz. Not sure if it matters for other countries that go by the metric system.
Use the calculator on USPS.com to play around a bit.