Though not as popular these days as smaller guitars, there are still plenty of jumbo and small jumbo models being made. Gibson offers versions in all of its different acoustic lines, as do Gretsch, Guild, Yamaha, and other companies. Some builders, like Lowden, have taken the jumbo in new directions. Lowden’s O (Original) style is especially noted for its dynamic ability—or headroom—to project delicate passages as clearly as aggressive strumming and big bass and overtones. Taylor’s biggest model, the 16-1/4-wide Grand Symphony, is another notable variation on the jumbo platform.
Source: A Guide to Identifying Common Acoustic Guitar Shapes and Sizes | Acoustic Guitar