The trial lesson allows you to try the instrument, meet the teacher, discuss your musical goals and musical questions, and discover how you can start making music.
It is always best if the student has their own instrument to bring to their trial lesson and essential for online lessons of course. For face to face lessons however your teacher may be able to supply an instrument for the trial lesson. Ongoing students will need their own instrument. Teachers can advise correct size and other details during the trial.