It is quite possible that a holster fitted for a PPK will not work for a PPK/S as the grip is longer. Also, not all PPK’s can use the same holster depending on the style of holsters. As an example, I ordered a Sneaky Pete holster for the PPK but my S&W PPK would not fit with the magazine with finger grip. (The ad showed it would) The problem was the extended tang. I swapped it for one that was made for a PPK/S and it works for both my PPK and PPK/S . 22LR.