Assuming you are referring to the Sterilite 6 Qt Storage Box:
-The outside dimensions of the storage box are 15 3/8" x 7 1/2" x 6 1/2".
-The inside dimensions of the storage box are 14 1/8" x 6 5/8" x 5 7/8".
-The storage box has a capacity of 6 quarts.