KALLAX Shelf unit, white, 30 1/8x30 1/8 "
+5″ margin
Will fit in a ?
No, it won't fit.
It will not fit in this setup: BILLY Bookcase, oak effect, 31 1/2x11x79 1/2 " is too large for a Citroen C3 Aircross 2019 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 26⅞″ even with diagonal loading. We're about 95% confident in this estimate.
BILLY Bookcase, oak effect, 31 1/2x11x79 1/2 "
Box: 81¼″ × 11¾″ × 5″ · 87 lb 5 oz
Based on IKEA US (United States).
Package dimensions last checked and updated on Aug 06, 2026
Package
Status
Limiting factor
Best orientation
Package #1
81¼″ × 11¾″ × 5″
Status:26⅞″ short
Limited by
Limiting factor:Opening width
Best orientation:Diagonal
Vehicle limits
Opening width / height
39⅜″ / 34¼″
Cargo width / height
37⅜″ / 38⅝″
Cargo length seats up / down
28¾″ / 56¼″
Loading sill height
27½″
Citroen C3 Aircross 2019
Measurements last checked and updated on Aug 29, 2026
Helpful tips
Use these loading tips to improve your chances of fitting BILLY Bookcase, oak effect, 31 1/2x11x79 1/2 " in Citroen C3 Aircross 2019.
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 Citroen C3 Aircross 2019
Ranked by fit margin and package-dimension similarity. This improves as we index more items.
About the Citroen C3 Aircross 2019 boot
The C3 Aircross trunk is short on floor and generous on height. The mouth measures 39⅜″ wide by 34¼″ tall, taller than most small SUVs offer, while the seats-up floor is only 28¾″ deep. Fold the bench and the floor grows to 56¼″, a gain of 27½″ that turns a grocery trunk into a usable flat-pack space. Width between the arches is 37⅜″, and the sill sits 27½″ up with a 4⅜″ drop inside. Tall boxes ride upright here better than in rival crossovers; long boxes need the seats down every time. Slide heavy loads over the sill instead of lifting them clear.
About the BILLY Bookcase, oak effect, 31 1/2x11x79 1/2 " package
The BILLY bookcase ships as one long, flat, heavy box: 81¼″ × 11¾″ × 5″ and 87 lb 5 oz. The length is the challenge, not the bulk. That long panel needs floor space most boots only find with the rear seats down. The flat-pack board is rigid, so it will not bend around a wheel arch or curl into a short boot. An estate, a hatchback with the seats folded, or an SUV handles it best. Slide it in long-edge first, low and flat, and protect the corners, because at this weight a dropped end can split the board.
Frequently asked questions
Find quick answers about fit for BILLY Bookcase, oak effect, 31 1/2x11x79 1/2 " in Citroen C3 Aircross 2019, including seats up vs seats down, limiting factor, best orientation, and package-by-package margins.
Will BILLY Bookcase, oak effect, 31 1/2x11x79 1/2 " fit in Citroen C3 Aircross 2019?
No. With seats up, it is short by 26⅞″ at Opening width, even with diagonal loading.
What is the tightest part?
The limiting factor is Opening width, with -26⅞″ margin in seats up.
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 -26⅞″ margin.
How tight is this fit?
This result is in the clear no-fit band (-26⅞″ at Opening width).
Does it fit with seats up or seats down?
Seats up: No (-26⅞″). Seats down: No (-12½″). Default selection follows YES > MAYBE > NO.
Why does it not fit?
The blocker is Opening width. The worst margin is -26⅞″ in seats up, so clearance is below the required buffer.
Can I load it diagonally?
Yes, diagonal is the best orientation for this check, with -26⅞″ around the limiting point.
Which loading orientation works best?
Diagonal is the best orientation for this result in seats up.
How confident is this result?
Confidence is 95 out of 100 based on available dimensions and margin tightness.