Introducing....

I occasionally get updates from Royal Mail via e-mail, at least it didn't start with, "Dear Customer"

We're introducing a new Large Letter format for our international services. Measuring a generous 35.3cm x 25cm x 2.5 cm, it means you can now benefit from a lower letter rate when sending larger, flat items abroad with Royal Mail.

The Large Letter format for international mail has been around for more than 6 months and was mentioned in the postal rates for April 2015 onwards.  So, I was wondering what "introducing" means.

Bring (something, especially a product, measure, or concept) into use or operation for the first time

.. is a definition from the OED for to introduce.  7 months too late! I already knew about this and had picked up the postal prices leaflets sticking them up on the wall.