On the Bionicle wikia, it’s said that Shadow Leeches are roughly 2 feet long in the books (No, they didn’t specify which book.) Despite this, Bionicle Wikia is very unreliable, and there’s no citation. Can anyone confirm if this is true (preferably with an excerpt from the book(s.))
Recommendation: Do not use BIONICLE Wikia. Use BS01. Here is a link.
The source is BIONICLE Legends #9: Shadows in the Sky, page 4.
Yeah, I checked on BioSector and couldn’t find anything. Thanks for the source though!