I have a hard cover book that is over 13 oz.  When I recieved the book it came in a bubble mailer and I kept it thinking I could use it when I have to mail the book out again.  Well now I have to mail it.....I already used printable postage.  Now I'm sitting here second guessing myself cause I'm not sure if I can use it.  The postage on the book when I recieved it is $2.93 when I used printable postage its $2.76.  So should I go out and buy a new mailer and use the postage label that I printed out, or use the old mailer.  Hope I make sense.

Thanks for the help

Hmmmm... to be safe.. you could always bump up the PBS weight be a pound..... which would cost something like another 38 cents and the you could rest easier. 

I finally broke down and got a scale to be sure becuase I was always wondering too!

Oh wait..... I just re-read... If you already have the paid postage printed and you think its too low, you can always throw a stamp on there too to cover any additional cost if your wieght was too low.

Do you have a way to weigh the package? The bubble mailer may have added just enough weight to the package to bump it into the next postal bracket. You could try taking to the PO and have them weigh it to double check or us an APC to check the weight.

If you can verify the weight, but don't want to go to the PO, you can add a stamp to get the postage up to the right total and still get by the 13oz rule, that only applies if all of the postage is stamps.

Did the original person send it media mail or 1st class?  They could have paid a little extra to send it 1st class.

I would weigh the book and look up the correct postage weight on the post office website.  Then add stamps if you need to increase the postage.  You should double check the weight on books before using the printged postage.  The PBS weight is not always correct.

No, it's not always right - but my experience has been that it's been on the heavy side when it comes to weight.  My USPS postal clerk used to shake her head at me for paying too much.  Someday I'll get a really good kitchen/postal scale (because like Alton Brown - I don't like tools that only do one thing!) ;D

Ruth