Which instrument is the biggest member of the brass family?

The tuba is the biggest member of the brass family. It has a large, conical shape and produces deep, rich tones, making it a fundamental instrument in orchestras and concert bands. The tuba typically plays the bass line in musical compositions and comes in various sizes and keys, with the BB♭ and CC tubas being the most common. Its size and design contribute to its unique sound and role in ensemble settings.