Section 160 is Split Up Into Diamond Boxes and Field Boxes
Section 160 at Busch Stadium is divided into three sub-sections. The one closest to the field is sometimes labeled 160D and the one farthest from the field is sometimes labeled 160B.
In Secion 160B, Row 20 there are 21 seats. As you look towards the field from your seats, Seat 1 is on the right aisle and Seat 21 is on the left aisle.