Car Key Fob vs Passport Book
From palm sized to hand sized
From palm sized to hand sized. Car Key Fob and Passport Book feel close enough in size that the comparison is mostly about proportions and silhouette.
Compare in 3D
Passport Book reads as 1.79x the size of Car Key Fob. Recommended view: Side by side.
Both objects stay in one true-scale scene because the ratio is still readable.
Car Key Fob to Passport Book
Side by side
1.79x gapBoth objects appear in one shared scene.
Short answer
Passport Book is larger, but not by enough to make Car Key Fob feel outclassed; the difference shows up in how each object uses its space. Passport Book is 1.79x longer than Car Key Fob. Laid end to end, it takes about 1 car key fob to match one passport book.
Car Key Fob is a car key fob with a rounded rectangular body and a small keyring point. Passport Book is a closed passport book with a dark cover and a compact rectangular shape. Put together, laid end to end, it takes about 1 car key fob to match one passport book.
Car Key Fob to Passport Book
Best first workspace for this ratio.
A fast gut-check for the size jump.
Dimension breakdown
| Property | Car Key Fob | Passport Book | Ratio |
|---|---|---|---|
| Characteristic size | 7 cm long | 12.5 cm tall | 1.79x |
| Length | 7 cm | 12.5 cm | 1.79x |
| Width | 3.5 cm | 8.8 cm | 2.51x |
| Height | 1.5 cm | 1.4 cm | 0.933x |
| Category | everyday | everyday | — |
What people usually misjudge
People often judge these by height first
That instinct misses the real contrast. This pair is more about footprint and spread than vertical reach, which is why the larger object can feel only slightly taller while still claiming much more space.
Volume usually diverges faster than intuition
Even when the silhouettes feel manageable, total occupied space can separate quickly. A rough volume estimate puts one passport book at about 4 car key fobs, which is why the bigger object can feel more dominant than a single dimension suggests.
Key insight
Treat this as a shape swap, not a huge scale jump. What makes this pairing useful is that both objects come from the same general world, so the contrast feels intuitive rather than exotic. Width does most of the work here, so the contrast feels like footprint and presence rather than pure height.
FAQ
How big is Car Key Fob compared to Passport Book?
Passport Book is 1.79x longer than Car Key Fob. Car Key Fob is listed at 7 cm long, and Passport Book is listed at 12.5 cm tall.
Where does the size gap show up most clearly?
Width does most of the work here, so the contrast feels like footprint and presence rather than pure height.
What changes when both objects share the same scene?
Laid end to end, it takes about 1 car key fob to match one passport book.