Hanging Backpack Organizer and Carry-On Organizer (Zippers) - 19L Capacity Our 19L organizer (Size Small: 18" x 9" x 7") fits perfectly into your Backpack or Carry-On. Enjoy a 30-Day Money Back Guarantee on all PACK Gear products. Never worry about losing anything again, zippers keep everything in place. Not even an earring can go missing. Enjoy at-a-glance inventory checks with mesh windows Save time at airports by keeping all your liquids in one compartment, making security checks a snap. Unpack in under 7 seconds! High quality YKK zippers leave you feeling confident packing and unpacking.