Sometimes one of the deciding factors to the size selection is the dimensions of the turner itself. While we do take custom order requests, these are the standard sizes for each turner in a L x H x W:

1 Arm: 6" x 11.5" x 8"
2 Arms: 12" x 12" x 8"
3 Arms: 18" x 12" x 8"
4 Arms: 24" x 12" x 8"
5 Arms: 30" x 12" x 8"
6 Arms: 36" x 12" x 8"
7 Arms: 42" x 12" x 8"
8 Arms: 48" x 12" x 8"
10 Arms: 60" x 12" x 8"

These measurements are seen as if you were facing the front of the turner. The length is the size from left to right. The height is self-explanatory. The width is from the wall to the front of the turn, not including the arm length.