So I thought I was being good and I took 2 invitations to the post office and had them weighed. They were both under the limit so they just needed a normal stamp. So I got a little excited and went home and put all the invites together, stamped them all up...and the I go to drop them off and BOOM!!! 28 out of 138 were over weight. How does that happen? there is nothing different in them they all had the same inside them. But most of them were 30 grams the others were 32 grams. I had to add 4 stamps and 44cents to each one that was over because Canada post doesn't make a 44cent stamp. How silly is that?