Simply overlap the 2 shelves and adjust to the desired width.
Spice Rack-Adjustable, Expandable 3 Tier Organizer for Counter, Cabinet, Pantry-Storage Shelves It could even be used in the bathroom or linen closet to store cosmetics or toiletries! Alternatively, the two pieces can be utilized separately in different cabinets as nonadjustable pieces. 6" x 9. Spice Rack-Adjustable, Expandable 3 Tier Organizer for Counter, Cabinet, Pantry-Storage Shelves.