The standard dimensions for a Nintendo Switch game cover inlay are: 208mm x 161mm (approx. 8.2" x 6.3"). Spine Width: 9mm to 10mm .
80lb (150g) glossy brochure paper or high-quality glossy photo paper . MARIO RABBIDS SPARKS OF HOPE (NSP)(US)(Update...
You can find official and custom cover art for the US version of the game from these community resources: The standard dimensions for a Nintendo Switch game