My wife and I have Minis in -
- 22LR 1 1/8" barrel
- 22LR 1 5/8" barrel
- 22 Mag 1 5/8 barrel
They are small guns but believe it or not, the 22 Mag is longer and thicker than a Kel Tec P32. A J-Frame is only 1" longer than the 22 Mag w/ 1 5/8 barrel.
Personally, my wife and I only carry them as BUG's. Biggest drawback of them is the single action with a tiny sized grip. They are last ditch stick it up someone's nose kind of guns. One step above a derringer. Recoil on them is pretty minimal. The 22 Mag's recoil is still way less than a 38 Snub.
If you must have a tiny revolver, you may want to look into the old H&R Young America or H&R Victor revolvers. I'll post a pic tonight, but size-wise, they are not much bigger than a NAA 22 Mag or Black Widow.