Print File 8x10 Standard Proof Box (1 Depth, Kraft) 504-0301

Office Depot® Brand Letter And Legal File Tote, 18 L x 14 1/4 W x 10 7/8 H, Clear : Office Products

EOOUT 3 Pack File Organizer Brown Cardboard File Box for Letter Size Collapsible Hanging File Folder Storage Hanging File Organizer with Handles for Office Home School : Office Products

Tyvek Sheets for Inkjet Printers 8.5 x 11 - 25 sheets/package : Office Products

Tyvek Sheets for Inkjet Printers 8.5 x 11 - 25 sheets/package : Office Products

1/2 Kraft 5x7 Standard Proof Box

SPB57KFT.5 - 5x7 Proof Box

Avery Heavyweight Diamond Clear Sheet Protectors, 8.5 x 11, Acid-Free, Archival Safe, Easy Load, 200ct (74400) : Document Protector : Office Products

Tyvek Sheets for Inkjet Printers 8.5 x 11 - 25 sheets/package : Office Products

Compared to chipboard, the cardboard inserts are pretty lightweight so they don't make your package too heavy.

50 Packs 8x10 inch Corrugated Cardboard Sheets, Premium Brown Kraft Corrugated Pads Cardboard Inserts Bulk Flat for T-Shirts, Shipping, Mailing, DIY

Avery Heavyweight Diamond Clear Sheet Protectors, 8.5 x 11, Acid-Free, Archival Safe, Easy Load, 50ct (74106) : Binder Letter Page : Office Products

Print File 8x10 Standard Proof Box (1 Depth, Kraft) 504-0301