Paper products fail in the post in predictable ways: corners get bumped, spines crack, prints bend and sticker sheets curl. Most of that comes down to a soft envelope that lets the item flex, or a box so big it slides around.

Our rigid mailers, expandable mailers and bubble envelopes suit flat goods that are heavy for their size, like books, planners and notebooks. Use the guide to match each product to a format, then order plain or printed from 100 pieces with no setup fee.