Will VÅGSTRANDA Pocket spring mattress, medium firm/white, Twin fit in a Toyota Corolla 2019?

The Corolla gives you a saloon boot: long once you fold, but pinched at the back. The opening is 39″ wide × 30⅜″ tall, and the floor runs 31⅞″ with the seats up, reaching 59⅞″ folded, a gain of 28″. The catch is the narrow point of 26⅜″, where the wheel arches close in, so wide boxes can jam even when the length is fine. The sill sits at 28¾″ with a 7½″ drop. It takes suitcases and medium boxes happily, long flat-packs only with the rear seats down. Load the widest item first, before the space narrows.

The VÅGSTRANDA Twin arrives roll-packed as a single dense block, 43¾″ × 18¼″ × 17½″, weighing 69 lb 4 oz. The shape is friendly, the weight is not: it is a compressed pocket spring mattress, so all of that mass sits in a stubby bundle with no handles and a wrap that likes to slip. Because its longest edge is 43¾″, most hatchbacks swallow it with a seat folded, and many boots take it outright. Carry it with two people, load it on its long side, and leave the wrapping sealed until it is in the bedroom: once it unrolls, it never goes back.