Classed by Royal Mail as 'Letter' size. A pack of 50 x Size B (00) Jiffy Airkraft Padded Bubble Envelopes. These are equivalent to mail lite/feather-post size B- the internal measurements of each envelope are 115mm x 195mm.
100 x Jiffy Airkraft Size 00 (B) Padded Envelopes 115x195mm[5055502314532]