I bought a pack of four "Charger" or "C" cases as a test and they go with everything. The smallest adapter I have is a "C" to "Micro" adapter and they fit so snug and tight, the largest adapter I have is a "C" to "A" adapter , and while it's a narrow and narrow stretch, once you manage to get it there, it's perfect. Now I will order a few dozen packs. A photo of a user complaining that it didn't fit the advertised "C" adapter apparently didn't read the ad and ordered a larger "A". Case "A" isn't really needed as I implied that case "C" would stretch to fit.