Compared to chipboard, the cardboard inserts are pretty lightweight so they don't make your package too heavy.
100 Pcs Corrugated Cardboard for Crafts 5 x 7 Inch
75 Pack Corrugated Cardboard Sleeves for Sports Cards, Trading
★RIGID AND LIGHTWEIGHT★ These cardboard sheets are actually sturdy and rigid which are PERFECT for shipping cards, postcards, art prints and other
200 Packs 3.5x4.5 Inch Corrugated Cardboard Sheets, Premium White Corrugated Cardboard Inserts Bulk Flat for Sports Card Protectors, Trading Card
What You Will Receive: you will receive 200 pieces of trading card shipping protectors, this quantity can pack 100 of trading cards and you can use
200 Pieces Trading Card Shipping Protectors 4.5 x 3.5 Inches Trading Card Packaging Cardboard Mailing Protector for Protecting Sports and Trading
Corrugated Cardboard Sheets - 6x9 Inches - Pack of UK
Corrugated Cardboard Sheets and Pads
Unique hologram design, no general design sold all over the internet Large quantities of stickers on stock, fast dispatch Customer satisfaction
Holomarks 500 pcs Silver Security Seal 0.59 x 0.59 Inch, Void Hologram Stickers, Warranty Tamper evident Holographic Labels
50 Pack Corrugated Cardboard Sheets Flat Cardboard
★RIGID AND LIGHTWEIGHT★ These cardboard sheets are actually sturdy and rigid which are PERFECT for shipping cards, postcards, art prints and other
400 Packs 3.5x4.5 Inch Corrugated Cardboard Sheets, Premium White Corrugated Cardboard Inserts Bulk Flat for Sports Card Protectors, Trading Card
★RIGID AND LIGHTWEIGHT★ These cardboard sheets are actually sturdy and rigid adding a good support for delivering for shipping cards, postcards,
200 Packs Corrugated Cardboard Sheets, Premium 3.5x4.5 Kraft Cardboard Divider Inserts Bulk Flat for Sport Cards, Trading Cards Shipping Protectors
50 Pack Corrugated Cardboard Sheets Flat Cardboard