Size AR7 (G/4 equivalent) Arofol branded gold padded bubble envelopes. These are equivalent to mail lite/featherpost size G and jiffy airkraft size JL4. The internal measurements of each envelope are 230mm x
Bubble Padded Envelopes | Smith Packaging Supplies
10 Large A3 Size Peel + Seal Gold Padded Bubble Envelopes - 340 x 445mm / 13.5 x 17.5" Postal Packing Mailing Shipping Postage Posting Self Seal Packaging Bags Mailers : Amazon.co.uk: Stationery & Office Supplies
Gold Bubble Envelope 320mm x 445mm, Size J Pack of 10 - Pukka Post & Packaging
Mail Lite F3 F/3 Easy Seal Padded Envelope - Gold (Pack of 50) : Amazon.co.uk: Stationery & Office Supplies