箱メーカー · Japanese GB / GBA box maker
Add a photo for each side, then download two sheets. Print both at 7-Eleven on 2L photo paper, cut along the outline, and glue the halves into one box.
Defaults are measured Japanese boxes (GBA 135×86×21 mm, GBC 96×121×21 mm). Boxes vary by a millimetre or so, so check yours with a ruler.
Sheet A
Sheet B
Only one dust flap per end fits on this paper. The lids still tuck in, but a dab of glue keeps the ends shut.