At 8 mm, these are the thickest walls in the category — nearly three times the usual. Pick it up once and you'll understand: this isn't packaging for your box. It's furniture for it.
Concealed neodymium magnets seat the lid with a soft, definite pull — no screws, no scraping friction fit. Lift it when you want the box in your hands; it lands true when you're done.
Every figure below is measured, not marketed. If a number matters to you and isn't here, ask us — we like collectors who check.