Indeed - I just sent out 60 invitations including heavy card stock for
the invitation itself and the response card, the response envelope, and
an additional sheet with information on it - all for the 45 cent stamp.
We could have included more if we wanted/needed and still not have
exceeded the weight limit.
-Don
Then your postie wasn't following the 'bendable' rules! "Heavy Card
Stock" shoud have a 'non-machinable' surcharge, per our PO.

THREE sheets here just make it though the 'thickness' slot, four get
surcharged!