Mayline SR6046RPG Kwik-File Mailflow-To-Go 2 Tier Sorter w/Riser, 50 Pockets, 60 x 13 1/4 x 46 1/4 The 2-tier, with riser Sorter has 50 pockets (11 5/8"W x 2 5/8"H x 13 1/4"D) The shelves are fixed The pockets are sized to accommodate commonly used 10" x 13" flat envelopes The sorter is available in multiple heights, with or without an elevated riser There are optional side dump rails, a task light, and label holders