KALLAX Shelf unit, white, 30 1/8x30 1/8″
+7¼″ margin
All items that fit a Cupra Formentor VZ 2023
Will fit in a ?
No, it won't fit.
It will not fit in this setup: BILLY Bookcase, black oak effect, 31 1/2x11x79 1/2″ is too large for a Cupra Formentor VZ 2023 with seats up.
Fit Details
With seats up, This package will not fit in this setup. The blocker is opening width, and you're short by 25⅜″ even with diagonal loading. We're about 95% confident in this estimate.
BILLY Bookcase, black oak effect, 31 1/2x11x79 1/2″
Box: 81¼″ × 11¾″ × 5″ · 86 lb 15 oz
Based on IKEA US (United States).
Package dimensions last checked and updated on Oct 21, 2026
Package
Status
Limiting factor
Best orientation
Package #1
81¼″ × 11¾″ × 5″
Status:25⅜″ short
Limited by
Limiting factor:Opening width
Best orientation:Diagonal
Vehicle limits
Opening width / height above sill
39″ / 23¼″
Cargo width / height
39⅜″ / 27½″
Cargo length seats up / down
31⅞″ / 62⅝″
Sill to floor drop
4⅜″
Cupra Formentor VZ 2023
Measurements last checked and updated on Oct 21, 2026
Helpful tips
Use these loading tips to improve your chances of fitting BILLY Bookcase, black oak effect, 31 1/2x11x79 1/2″ in Cupra Formentor VZ 2023.
Optimize opening width
Keep the narrow edge leading while entering the opening.
Load diagonally first
Load diagonally first, then straighten once inside.
Try fitting alternatives
Check the Similar items that fit section for safer alternatives.
Alternatives that fit in Cupra Formentor VZ 2023
Ranked by fit margin and package-dimension similarity. This improves as we index more items.
About the Cupra Formentor VZ 2023 boot
Width is the easy part of the Formentor VZ's boot. The opening is 39″ wide, and the floor is 39⅜″ at its narrowest, so nothing narrows once a box is through. Height is the tight part, and the reason tall boxes struggle: the opening has 23¼″ of clear height above the loading sill, though the boot is 27½″ tall from its floor, which sits 4⅜″ below the sill. Seats up, the floor gives you 31⅞″ of length. Folding the rear seats is worth 30¾″, for 62⅝″, enough for longer flat packs. Whatever face a box rests on, it has to pass under that 23¼″, so decide which side stands up before you lift it.
About the BILLY Bookcase, black oak effect, 31 1/2x11x79 1/2″ package
You get the black oak effect BILLY in a single box, 81¼″ long, 11¾″ wide and 5″ thick. It weighs 86 lb 15 oz, and over that length the weight is hard to control, so plan on two of you, one at each end. Lying straight, it needs 81¼″ of boot floor, though its width and thickness still matter. Lift together on a count, so neither of you takes the full weight, even for a second. Set it down the same way, both ends at once.
Frequently asked questions
Find quick answers about fit for BILLY Bookcase, black oak effect, 31 1/2x11x79 1/2″ in Cupra Formentor VZ 2023, including seats up vs seats down, limiting factor, best orientation, and package-by-package margins.
Will BILLY Bookcase, black oak effect, 31 1/2x11x79 1/2″ fit in Cupra Formentor VZ 2023?
No. With seats up, it is short by 25⅜″ at Opening width, even with diagonal loading.
What is the tightest part?
The limiting factor is Opening width, with -25⅜″ margin in seats up.
Why does it not fit?
The blocker is Opening width: with seats up, the box is 25⅜″ bigger than the space there.
Can I load it diagonally?
Yes, diagonal is the best orientation for this check, with -25⅜″ around the limiting point.
Which loading orientation works best?
Diagonal is the best orientation for this result in seats up.
Does it fit with seats up or seats down?
Seats up: No (-25⅜″). Seats down: No (-8¾″). Default selection follows YES > MAYBE > NO.
What do YES, MAYBE and NO mean here?
YES means there is at least 2⅜″ to spare at the tightest point, in the best way the box can go in. MAYBE means it fits on paper, but with less than 2⅜″ to spare, so trim, the parcel shelf or the loading angle can decide it. NO means the box is bigger than the space at its tightest point, whichever way it goes in. Every margin on this page is that real gap: the car's measurement minus the box's.
What should I do instead?
Use the Helpful tips & alternatives section to choose a smaller item, different orientation, or split-load plan.
Is the trunk opening the issue?
Yes. The tightest constraint is at the opening (Opening width) with -25⅜″ margin.
How tight is this fit?
This result is in the clear no-fit band (-25⅜″ at Opening width).