KALLAX Shelf unit, white, 30 1/8x30 1/8″
+3½″ margin
All items that fit a Toyota Yaris 2018
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 Toyota Yaris 2018 with seats up.
Fit Details
With seats up, This package will not fit in this setup. The blocker is cargo length, and you're short by 30⅛″ 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:30⅛″ short
Limited by
Limiting factor:Cargo length
Best orientation:Diagonal
Vehicle limits
Opening width / height above sill
34⅝″ / 27½″
Cargo width / height
39¾″ / 34¼″
Cargo length seats up / down
26¾″ / 52⅜″
Loading sill height
26¾″
Toyota Yaris 2018
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 Toyota Yaris 2018.
Use available cargo length
Use seats down if available to gain cargo length.
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 Toyota Yaris 2018
Ranked by fit margin and package-dimension similarity. This improves as we index more items.
About the Toyota Yaris 2018 boot
Everything you load into the Toyota Yaris 2018 boot has to pass an opening 34⅝″ wide, with 27½″ of clear height above a 26¾″ sill. Past it, the space opens up: the floor is no less than 39¾″ wide, it lies 6¾″ below the sill, and the boot rises 34¼″ above that floor. The floor is only 26¾″ long with the rear seats up, and folding them adds 25⅝″ to reach 52⅜″. Short, chunky boxes suit it, and a few boxes longer than 26¾″ fit with the seats up, turned on their side. So measure every box against those two opening figures first.
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 Toyota Yaris 2018, 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 Toyota Yaris 2018?
No. With seats up, it is short by 30⅛″ at Cargo length, even with diagonal loading.
What is the tightest part?
The limiting factor is Cargo length, with -30⅛″ margin in seats up.
Why does it not fit?
The blocker is Cargo length: with seats up, the box is 30⅛″ bigger than the space there.
Can I load it diagonally?
Yes, diagonal is the best orientation for this check, with -30⅛″ around the limiting point.
How tight is this fit?
This result is in the clear no-fit band (-30⅛″ at Cargo length).
Does it fit with seats up or seats down?
Seats up: No (-30⅛″). Seats down: No (-16⅝″). 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.
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.