Envelopes
AROFOL Bubble Padded Envelopes Mailers, Size 10 (350 x 470 mm) - White, 100
Quality Bubble Padded Envelopes Mailers. Colours: available in gold/brown & white. Sizes: 10 sizes available (suitable for A5, A4, A3, and other sizes available). Internal dimensions given. Quantity: available in quantities of 50, 100, 200 etc.
https://www.bizrate.co.uk/envelopes/arofol-bubble-padded-envelopes-mailers-oid39899494448.html