Found 29th Apr 2013
Using the link within this deal you can order a free Royal Mail Cardboard Parcel Measuring Template directly from Royal Mail. These are the same as the ones used in the post office but are made out of cardboard instead of plastic and have measuring slots for Letter, Large Letter and Small Parcel. This is mainly aimed at business customers and asks for a company name when filling out order form however you can simply put N/A in that field. It should take around a week for the size template to arrive. Hopefully it should arrive as all users on ebay forums who have ordered them so far have said they have come. These are a great way to make sure your parcel fits the criteria for the new small parcel size.