So I took my invitations to the post office to be weighed and we found out we just need the 65 cent stamp. But then, the post office worker was like...hmm. This feels a little stiff. We charge an additional 20 cents for "rigid-ness". What! Has anyone else heard this? I'm sending 2 practice ones out to my aunts just to see if we can get away with just teh 65 cents.