| XI Sub | Launched | LOA (ft) | Beam (ft) | Std. Disp. (tons) | Full Load Disp. (tons) | Shafts | Armor | Speed kts | Guns |
| XI | 1923 | 363.5 | 29.8 | 2425 | 3600 | 2 | . | 19.5 | 6 TT, (4) 5.2 inch (2x2) |
| (363'-6") | (29'-10") | ||||||||
| LOA (inches) | Beam (inches) | Std. Disp. (lbs) | Full Load (lbs) | Pump | Armor | Speed 100' | Guns | ||
| 45.44 | 3.73 | 6.1 | 9.1 | 1/2 | 1/32" | 58.4 | 6 TT, 4 BB (2x2) |