Will BRIMNES Cabinet with doors, white, 30 3/4x37 3/8 " fit in a Seat Ibiza 2022?

The Ibiza's cargo area is compact and honest about it: the opening is 34⅝″ wide by 32¼″ tall, the floor gives you 26¾″ with the rear bench up, and folding it opens 55½″, a gain of 28¾″. Between the wheel arches you keep 39″, more than the opening is wide, so a box that clears the mouth can settle flat inside. It handles short stacked boxes well and long flat packs poorly; most rejections happen at the opening, not on the floor. The liftover sits 27⅛″ high with a 7½″ drop inside, so rest a heavy box on the sill edge and lower it in instead of pushing.

The BRIMNES cabinet arrives as one flat box, 39″ × 16¾″ × 6″, weighing 72 lb 7 oz. The size is friendly; the weight is not. At 39″ long it clears the folded load floor of almost any car, and plenty of boots take it with the seats still up, so this is one of the easier IKEA packages to move by car. What catches you is lifting 72 lb of dense flat-pack over a sill on your own. Slide it on its long edge rather than carrying it flat, bring a second pair of hands for the kerb and the stairs, and protect the corners; chipboard shows every knock at the edges.