| GUN | LENGTH | HEIGHT | WIDTH | WEIGHT | CAL |
| Vest Pocket | 4.1" | xx" | xx" | 13 oz | .25 ACP |
| PICO | 5.1" | 3.9" | .72" | 11.5 oz | .380 |
| Tomcat | 4.9" | 3.7" | 1.1" | 14.5 oz | .32 ACP |
| Rohrbauch | 5.2" | 3.7" | .83" | 14.3 oz | 9mm |
| Nano | 5.6" | 4.2" | .9" | 18 oz | 9mm |
| PPK/S | 6.1" | 4.3" | 1.2" | 22.2 oz | .380 |
The Rorhbaugh is still the smallest mini-9, I think but the Nano comes pretty close.
I built this chart to compare the Nano with the PPK/S, what many people consider the classic pocket pistol. Today's 9mm's are the size of the traditional .380s.
Today's .380's are the size of a traditional .32, which the Pico vs. Tomcat rows show.
Amazingly the Rorhbaugh is pretty much the size of the Tomcat - they have shrunk the 9mm all the way down to the size of a .32!
I'd love to see Beretta make a next-gen .32!
The master's smallest gun, the Colt Vestpocket. He also invented the cartridge for it, the .25 ACP, along with the .32 ACP, .380 and .45 ACP. Still a masterpiece of miniaturization. 