Will MARKUS Office chair, Vissle dark grey, Medium fit in an Opel Grandland 2022?

The Grandland opens wide: 108 cm across, 81 cm tall, with 101 cm of floor width behind it, so most boxes go straight in without turning. Seats up you have 89 cm of length. Fold the rear bench and the floor runs to 169 cm, a gain of 80 cm, the biggest step this boot makes. The sill sits 78 cm off the ground with only a 16 cm drop to the floor, so loads slide in almost level instead of dropping in. That suits heavy boxes and multi-pack loads. Long flat packs need the seats down.

MARKUS ships as a single box of 98 cm × 59 cm × 23 cm: short by flat-pack standards but deep, closer to a stout crate than the usual thin slab. At 22.36 kg it is a one-person carry if you keep it close to your body, though the depth makes it awkward to hug through a doorway. Nearly any car takes a box like this with one rear seat folded, and bigger boots manage it without folding anything, which makes this one of the simpler IKEA collections you will do. Slide it in flat on its 59 cm side rather than upright, and load it last: a 23 cm thick box blocks more of the aperture than you expect.