Classed by Royal Mail as 'Packet' size. 200 x Size G (4) Jiffy Airkraft Padded Bubble Envelopes. These are equivalent to mail lite/feather-post size G - the internal measurements of each envelope are 240mm x 320mm.
200 x Jiffy Airkraft Size 4 (G) Padded Envelopes 240x320mm[5055502315676]