This rack was designed to fit inside of a small wooden box to hold and display vials that contain perfume samples. The rack measures 100mmx102mm, just under 4" square, and holds 16 of these small vials. The vials can be up to 12.5mm in diameter and 60mm in length. The design was created as a bespoke one-off for my wife, and it is shared here with a permissive public domain license.