The Warwick Thumb is an electric bass used by Prince and Sonny T in the 1990s. It was Prince's primary studio bass from the 1990s onwards.
Prince had three Thumb basses:
- A white Thumb with a custom "eye" graphic. This was Prince's main live and studio bass. It appears in many photographs and videos from the mid to late 1990s.
- A black Thumb with the lyrics to Gold printed in gold lettering. It can appears in the Gold and Endorphinmachine videos, played by Sonny T.
- A natural fretless Thumb. Prince hardly used this bass.
All three Thumb basses remain in the collection at Paisley Park and appear in the Prince - Guitar & Bass book.