Mail Lite White Bubble Lined Bags Size B/00 140 x 220mm are an ideal and economical solution for small items, such as jewellery, keys or , that need protecting in the post. This size of Mail Lite mailer that is classed as a letter by Royal Mail. Designed for recycling once used and being made with at least 60% recycled content they are a great environmentally friendly option. FSC Certified.