The in-the-canal (ITC) style of hearing aids is provided with a custom-made fit that only fills out the lower half of the external ear. These hearing aids are often unseen to someone directly facing the wearer. To ensure a comfortable perfect fit, a mold of each ear is taken to produce the shape of the hearing aid. When a smaller size hearing aid is preferred, the ITC is often chosen instead of the in-the-ear (ITE) style.