Have you ever gone to the post office to find out that you have to pay extra because your card is simply too thick? Did you know that if it is over 1/4″ thick or has tons of bumps (gems) extra postage is required?
My first tip is to make sure the bumps or gems go towards the back of the envelope where the address is not. Second, sliding a scrap piece of paper or card stock in front of the bumps often helps too.
But wouldn’t it be nice if you had a device to measure the thickness of your cards to know if they needed extra postage? Well…for $5 you can have the first class mail letter gauge.

I have these available just for you. This is a guide and is not for official use with the post office. I still recommend that if there is a question to go to the post office or place extra postage on that envelope.
If you would like one please go to https://stampingwithjoni.com/product/first-class-mail-letter-gauge.
Happy Crafting!
With inky fingers,
Joni 🙂