Size AR8 (H/5 equivalent) Arofol branded white padded bubble envelopes are equivalent to Mail Lite/Featherpost size H and Jiffy Airkraft size JL5. The internal measurements of each envelope are 270mm x 360mm, classified by Royal Mail as ‘Packet’ size. Manufactured in the UK using high-quality FSC-certified paper sourced from sustainable forests. They are lined with premium bubble film for enhanced protection, with a continuous 10mm edge for superior tear resistance.