Will POÄNG Armchair, birch veneer/Knisa light beige fit in a Citroen C5 Aircross 2021?

The C5 Aircross gives you a wide, square loading mouth: 41″ across and 30¾″ tall, with a floor that is actually wider than the opening at 41¾″ between the arches. Seats up you get 38¼″ of length; folding them stretches that to 67¾″, a gain of 29½″. The catch is the sill, which sits 29⅛″ off the ground, though the floor drops only 1⅝″ behind it, so boxes slide in level rather than falling in. Wide flat packs do well here; very long ones run out of floor before they run out of mouth. Lift heavy boxes to sill height first, rest them, then push.

The POÄNG armchair ships as one flat box, 29 inches by 26 1/4 inches and only 2 3/4 inches thick, so it behaves like a large stiff panel rather than a bulky load. At 18 lb 1 oz it is light enough to carry one-handed, and the thin profile slides behind a front seat or flat across most boots. The awkward part is the width, not the weight: the panel will not flex, so do not wedge it into a curve. Lay it flat, protect the corners, and almost any hatchback or estate takes it without folding a seat.