Corrugated cardboard box - small (pack of 15 units) - Canada Post
Small Cardboard Shipping Boxes With Lid Brown Mailers Boxes - Etsy Canada
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Amazon.com: 30 Pack 7x5x2 inch Shipping Corrugate Boxes Mailers, White Cardboard Shipping Box Corrugated Box, Literature Mailer Box for Mailing Crafts, Storing and Moving by zmybcpack : Office Products