Public Service Announcement

Square envelopes need 12 extra cents to get to where they are going.

I have not yet gone to the post office to see the gamut of supplimental stamps. The online store does not even show you 1 or 10 cent stamps (afaik) and I know they exsist.

Also... I have some left over stamps from 4 years ago that ought be used. They only say "first class" on them, rather than however much stamps cost at that time, but they also have "2000" in very very small print, so I couldn't pass them off as current. Any ideas?