Yu-Packet Post Mini Dedicated Envelope 10 sheets Brand new, unused Outer dimensions: 21.6cm (long side) x 17.8cm (short side) Inner dimensions: 21.1cm (long side) x 16.8cm (short side) Excluding the envelope flap. Due to the manufacturing process, there may be a difference of approximately 1mm on each side. Weight: Under 2kg Will be shipped folded and with waterproof protection!