Cute! Tiny little wooden chest with a curved lid and a hinged clasp.
2" tall x 3-1/4" wide x 2-1/4" deep. The "walls" are fairly thick, so the inside measures 1-1/1" deep by a bit over 2-1/2" wide (wide enough for displaying ATCs).
Also shown below with the 2 sizes of wooden wheels (both linked below if still in stock).