The 100 pack of Size B/00 Mail Lite Size B/00 Bubble-Lined Envelopes are a great way of getting value for money. They are durable and tough, sure to keep your items protected in the post. The white kraft paper exterior contains a lightweight sealed AirCap bubble lining to ensure the risk of damage in the post is reduced.The Size B/00 Mail Lite envelopes are ideal for sending flexible items such as books, photographs, jewellery and even small items of clothing.These envelopes have internal measurements of 120 x 210mm.