Instruments of different sizes exist with ranges of three to five and a half octaves.
Celesta with three octaves (portable instrument): C5 – C8 (concert)
Celesta with four octaves: C4 – C8
Celesta with five octaves: C3 – C8
Modern instruments usually have a range of five and a half octaves, so modern composers can write celesta parts over five and a half octaves if they so wish.
New celesta with five and a half octaves: C3 – F8