How big is SpongeBob SquarePants next to Plankton?
SpongeBob SquarePants measures 10.2 cm (4 in) from the ground up, and Plankton measures 1.27 cm (0.5 in) from the ground up. SpongeBob SquarePants comes to 8.00 times the height of Plankton, a difference of 8.89 cm (3.5 in). Take 8 Planktons stacked up and you land on SpongeBob SquarePants almost exactly, 0 mm (0 in) short. SpongeBob SquarePants is written in tens of centimetres and Plankton in single centimetres, a whole band of scale apart.
| Object | Real size | Axis measured | What the figure covers |
|---|---|---|---|
| SpongeBob SquarePants | 10.2 cm 4 in |
Height | Ground to highest point |
| Plankton | 1.27 cm 0.5 in |
Height | SpongeBob SquarePants |
Both figures, SpongeBob SquarePants and Plankton, come from the Size It Up measurement set, one real-world size and one measured axis per object, last checked in September 2026; outline provenance is listed on the sources page.
Why this one is hard to judge by eye
SpongeBob SquarePants is drawn about 17.0 times as wide as Plankton as well as 8.00 times its height, so the area it takes in the frame grows faster than the figure anyone quotes. Both shapes fit in a single glance here, which ought to make 8.00 to one obvious between SpongeBob SquarePants and Plankton, and it is not: at this size the eye compares whole outlines while the figures above compare one axis. At 8.00 times, SpongeBob SquarePants against Plankton sits past the factor of about five where estimates stop tracking the real ratio and settle into a vague much bigger.
What each figure covers
SpongeBob SquarePants. The height is the studio figure, a little over ten centimetres. Real sea sponges have no fixed size at all, which is part of the joke.
Plankton. The height is the studio figure. At just over a centimetre the character is drawn far larger than any real plankton, which is microscopic.
SpongeBob SquarePants and Plankton are both quoted as a height, which is what makes the ratio above a like-for-like figure.
What else is about that size?
Measured the same way, SpongeBob SquarePants at 10.2 cm sits within a quarter of Apple at 9 cm, Playing Card at 8.89 cm and Coca-Cola Can at 11.5 cm. Plankton at 1.27 cm has Die at 1.6 cm for company, within two fifths. Swapping any of those in for SpongeBob SquarePants would move its ratio to Plankton by less than 25%.