Will VITTSJÖ Shelf unit, black-brown/glass, 39 3/8x68 7/8 " fit in a Mazda CX-5 2023?

The CX-5's cargo opening measures 41¾″ wide by 31⅛″ tall, with 37¾″ of floor behind it when the seats are up. Fold the bench and the floor stretches to 66⅞″, a gain of 29⅛″, which is what makes longer loads possible at all. The floor holds 41⅜″ at its narrowest, so wide flat boxes lie level instead of wedging. Short, boxy loads fit fine seats up; anything long depends entirely on folding. The liftover sits at 29⅞″ with a 2″ drop to the floor, so lift heavier boxes clear of the sill rather than dragging them across it.

VITTSJÖ ships as one long, flat carton, 79¼″ × 15¼″ × 3½″ and 60 lb 12 oz. The length is the awkward part: a rigid flat-pack just under 80 inches that will not bend around a tight boot mouth, and there is glass inside, so the box does not forgive a hard knock. A car that takes it easily is an estate, an SUV, or a hatchback with the rear seats folded flat. In anything smaller, load it diagonally from a folded seat back toward the boot, longest edge leading, and rest it on a blanket. Keep it printed side up so the glass shelves stay flat, and slide it in rather than drop it.