View Larger Trundle/Storage Drawer Collection: Glitz & Glam Item #: 8800-9500 75W x 41D x 12H On Casters. Use with the 8800 Panel Beds. Cannot be used with the Upholstered Mermaid Beds. Takes a standard twin mattress (max size: 75x39x8) for use as an extra bed or 2 removable dividers (included) allow for organized underbed storage option. Requires Bed Rails. Rails must be in high position.