Our Monitored Mail Labels each measure 50 x 25mm and have a permanent adhesive.Stick these Monitored Mail Labels onto your packets, envelopes or parcels prior to dispatching through the postal system.Please note: The label itself has no tracking purpose and is not endorsed by Royal Mail or any other carrier.The labels are dispatched flat so are in handy strips so can be easily stored..Printed by the latest Thermal Transfer Printer using a wax resin.Print is waterproof so it won't smudge if handl