.32 S&W

The .32 S&W cartridge was introduced in 1878 for Smith & Wesson pocket revolvers. It was originally designed as a black powder cartridge. The .32 S&W was offered to the public as a light defense cartridge for "card table" distances. Wikipedia
 
Bullet diameter.312 in (7.9 mm)
Rim diameter.375 in (9.5 mm)
Neck diameter.334 in (8.5 mm)
Base diameter.335 in (8.5 mm)
Case length.61 in (15 mm)
Overall length.92 in (23 mm)
Rim thickness.045 in (1.1 mm)