【Office Staple: Reliable Storage with "D-Ring File, D-Type, 4-Hole"】 ・Dimensions: Height 315mm x Width 280mm x Spine/Depth 64mm ・Size: A4 Vertical ・Number of Holes: 4 ・Capacity: 500 sheets of copy paper ・Binding Type/Material: Lock ring type with safety stopper A thick, 4-hole D-ring file that can hold 500 sheets of copy paper. When using clear pockets (0.06mm thick), it can hold 170 sheets if you put 2 sheets of copy paper in each pocket. 【Collect Refill Transparent Pocket Leaf】 → A4 9-pocket, 30-hole, 3 rows x 3 tiers, 20 sheets → A4 4-pocket, 30-hole, 2 rows x 2 tiers, 10 sheets → A4 2-pocket, 30-hole, 2 tiers, 10 sheets You can put them in directly if you use Seria's hard cases! (See the photos for details) Pocket leaves with excellent transparency. Compatible with A4 size binders with 30 holes, 2 holes, and 4 holes. For storing business cards, trading cards, etc. Also perfect for mini photo sizes. Size (Width x Height): Pocket outer dimensions 234mm x 309mm, Pocket inner dimensions 99mm x 72mm