Coat pocket

Pockets are a practical but often overlooked feature in menswear. From prehistory all the way up until the 17th century, what we consider to be a pocket–pouches sewn into clothing–did not exist. Since its invention however, it has evolved and transitioned alongside western fashion.

The main forms of external pockets on jackets (in order of increasing formality) are: patch, flap, and jetted.(1)

In addition to the standard two outer pockets, some suits have a third, the ticket pocket, usually located just above the right pocket and roughly half as wide. While this was originally exclusively a feature of country suits, used for conveniently storing a train ticket, it is now seen on some town suits. Another country feature also worn sometimes in cities is a pair of hacking pockets, which are similar to normal ones, but slanted; this was originally designed to make the pockets easier to open on horseback while hacking, also called pleasure riding.