def base128Size(n):
    """ Return the length in bytes of a UIntBase128-encoded sequence with value n.

	>>> base128Size(0)
	1
	>>> base128Size(24567)
	3
	>>> base128Size(2**32-1)
	5
	"""
    assert n >= 0
    size = 1
    while n >= 128:
        size += 1
        n >>= 7
    return size
