Will BISSA Shoe cabinet with 3 compartments, white, 19 1/4x11x53 1/8 " fit in an Opel Astra 2022?

The Astra gives you a compact hatchback boot built around a 37⅜″ wide by 28″ tall opening. Seats up, the floor runs only 28¾″ deep, so it suits shopping, cases and smaller flat boxes rather than long loads. Fold the rear bench and the floor stretches to 60⅝″, a gain of 31⅞″, which is where this boot earns its keep for flat-pack runs. The narrow point across the back is 40⅛″, and the lip sits 27⅛″ off the ground with a 5⅛″ drop to the floor. Long boxes go in on the diagonal through that 37⅜″ opening, so measure the opening, not just the boot.

BISSA ships as a single flat box, 54¼″ × 16¾″ × 3″, and it weighs 45 lb 15 oz. At 3″ thick it slides into gaps a built cabinet never would, so the thickness is not your problem. The length is. At 54¼″ you need a trunk that measures long enough on the floor, or one rear seat folded so the box can run forward between the seats. Most hatchbacks take it with the seats down, and any wagon or SUV swallows it flat. Lift it on edge with two hands, and rest it on a long edge rather than a corner, because 45 lb 15 oz of flat pack lands hard and the corners split first.