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This article's name is conjectural.
Although this article is based on official information, the actual name of the article's subject is pure conjecture.

The Size Beam is a gimmick that appears in the Sonic the Hedgehog series. They are size-altering machines found on the Little Planet.


When a living being touches a Size Beam, he/she/it will become bigger or smaller depending on the laser's color.

The Size Beams are usually fitted in corridors to shoot lasers down towards the ground. If the playable characters are caught in the beam, it will alter their size. The red lasers cause the playable character to become ⅔ of his original size. This will allow the playable character to run through corridors otherwise too narrow to pass though. The blue lasers will cause the playable character to return to their default size.

Game appearances

Sonic the Hedgehog CD

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In Sonic the Hedgehog CD, Size Beams appear exclusively in Metallic Madness Zone 2. There, the player finds them near the end of the Zone, where he/she will have to go through a big maze full of Springs, monitors and other obstacles. Upon completing this "maze", Sonic will return to his normal size and will be able to proceed to the Goal Plate and finish the Zone.

Sonic Mania

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In Sonic Mania, and its expansion Sonic Mania Plus, the Size Beam generators appear exclusively in Metallic Madness Zone. They also play a significant role for the boss fight in Metallic Madness Zone Act 2; before fight, the player has to pass through a Size Beam, forcing the playable character to face the boss as their miniaturized selves.

In other media

Sonic the Comic

A Sonic from a near future encouraging Sonic into the Size Beam in Sonic the Comic. Art by Richard Elson.

In the Sonic the Comic british comic series published by Fleetway Editions, a midget version of Sonic from a near future encouraged Sonic into a Size Beam to make him small as well. This was done so that Sonic would be able to infiltrate a machine in the Miracle Planet's past to disable it and prevent it from turning the planet into a mechanical wasteland.[1]


  1. Sonic the Comic #27, "The Sonic Terminator, Part 4"

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