Comparison of Back Wedges
| Product | Width | Length | Maximum Thickness |
| Standard Back | 12.5" | 18" | 2" |
| Thin Back | 12.5" | 18" | 1.5" |
| Medium Back | 14" | 18" | 2" |
| Thick Back | 12.5" | 18" | 2.5" |
Comparison of Back Wedges
| Product | Width | Length | Maximum Thickness |
| Standard Back | 12.5" | 18" | 2" |
| Thin Back | 12.5" | 18" | 1.5" |
| Medium Back | 14" | 18" | 2" |
| Thick Back | 12.5" | 18" | 2.5" |