same as any other j-frame size, but in the smaller calibers like 22rimfire, 22WMR, 32
traditionally not snubbies per se, not really a prime choice for such as CCW, best suited to small game and/or just fun range shooting
mostly (but not always) in 3" to 5" barrel lengths (4" versions always appealed most to me); very "handy", easy to tote along
good ones are every bit as accurate as their larger K/L/N and larger bore SA brethren
Ruger Bearcats and classic 22 j-frame rimfire S&Ws strike me as being prime examples
I have a nice little INA 32 S&W snubbie, slightly smaller than "J" actually, but it just never seemed to me to be a good example of a "kit" gun; more a minimalist CCW gun
"kit gun" is a very subjective term, I guess, but if fits in your kit, it probably qualifies: you could easily include some current versions of smaller Ruger or Buckmark autoloader rimfire 'campers' if so inclined
I do love my old 4" model 63, just because it adds yet another dimension of fun to range day, and is real appealing to youngsters and ladies with smaller hands, yet can shoot head to head with the "full size" guns of same caliber
in short, you can do anything with them that you could do with any other of same caliber