Is it possible for a 12 year old to be mezzo-soprano if you can hit all the mezzo soprano notes?

While it is possible for a 12 year old to have the vocal range of a mezzo-soprano, which typically spans from A3 to A5, it is uncommon. The human voice develops over time, and most children's voices do not fully mature until they are in their late teens or early twenties. It is important for young singers to develop their voices gradually and avoid straining them, as this can cause damage to the vocal cords. If a 12 year old is interested in singing, they should work with a qualified voice teacher who can help them develop their vocal technique and avoid any potential problems.