I just took some measurements that I hope help...
Measurements of bag's interior:
Depth tapers from bottom to top
Depth at bottom bout: 4 1/4 inches
Depth at upper bout: 3 1/2 inches
Depth at top of bag: 3 inches
Interior width at bottom bout: 15 1/2 inches
Interior width at upper bout: 11 inches
Interior Length: 42 inches
Measurements on my 000-15sm as applies to the bag, which shows why it worked out well.
Bottom bout depth 4 inches
Upper bout depth: tapers to 3 inches at neck
Bottom bout width across top at widest point: 15 inches
Upper bout width at widest point: 10.5 inches
Guitar total length: 40 inches