Will VITTSJÖ Shelf unit, black-brown/glass, 39 3/8x68 7/8 " fit in a Volvo XC60 2022?

The XC60 gives you a wide, flat, square boot rather than a deep cave. The opening is 44⅛″ wide and 29⅛″ tall, and the floor runs 37¾″ with the rear seats up. Fold them and it nearly doubles to 70⅛″, a gain of 32¼″, so the seats-up length is the real limit on anything long. The floor stays a wide 43¾″ across at its narrowest, which suits flat boxes and multi-package loads. The lip is 28⅜″ off the ground but level with the floor inside, so you slide loads in rather than lift them over a step. For long flat-packs, fold the bench first and load down the middle.

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.