Expanding File Wallets
Folders & Filing · 6 specs
Direct Answer
Expanding File Wallets (accordion expanding jackets made of heavy red rope paperboard or Tyvek) feature multi-fold expandable side gussets ranging from 1.75 inches (400 sheets) up to 5.25 inches (1200 sheets). Equipped with protective top flap closures and elastic cord ties, they are standard for real estate closing packages and tax audit portfolios.
Source: Commercial Document Packaging Standards · Last reviewed Aug 28, 2026
Specs
| 1.75-inch Expansion Gusset (44 mm) | Capacity: approx. 400 sheets (20 lb paper) |
| 2.0-inch Expansion Gusset (51 mm) | Capacity: approx. 500 sheets |
| 3.5-inch Expansion Gusset (89 mm) | Capacity: approx. 800 sheets |
| 5.25-inch Expansion Gusset (133 mm) | Capacity: approx. 1200+ sheets (heavy multi-case portfolios) |
| Gusset Reinforcement | Tyvek / Mylar lined accordion side pleats to prevent edge blowout under heavy load |
| Closure Styles | Full protective flap with heavy-duty elastic bungee cord or cloth tie string |
Gusset Durability Engineering
Standard paper accordion pleats tear easily when stuffed with heavy legal files. Commercial archival wallets reinforce the interior and exterior of the side gussets with spun-bonded olefin (DuPont Tyvek), providing tear-proof expansion that withstands up to 10 kg of document weight.