A universal case is a compromise in both directions — too loose to display well, too tight to load without scraping a corner. This one is measured to the Collector Booster footprint with a deliberate millimetre of clearance on every face.
Collector boxes are printed to be looked at, which means they get shelved where the light is. The acrylic filters roughly 99% of UV between 300 and 400 nm — the band that takes the colour out of print — while staying optically clear.
Every figure below is measured, not marketed. If a number matters to you and isn't here, ask us — we like collectors who check.