A straight pocket

With a flap pocket is exactly what it sounds like - a pocket with a rectangular flap covering the opening, fashioned from the same fabric as the rest of the jacket. Straight pockets are a traditional and standard option for your suit jacket pocket, and the Can't-go-wrong choice if you're undecided between the two.

A slanted pocket

With a flap pocket is the same as the description mentioned above for a straight pocket with a flap pocket except it's slanted opposed to being straight. If you want to stand out and stand tall, slanted pockets are the way to go.

Piped pockets

Also known as jetted pockets, besom pockets or welted pockets.

Besom Pockets

Weather they are straight, double or slanted, they feature no flap but are otherwise identical to flap pockets. With ultra clean lines and minimal visual bulk, this is inherently the most formal of the suit jacket pocket types.

Consequently, piped pockets are a must for tuxedos and dinner jackets because of the sleek, clean silhouette that it promotes. Dapper dressers who like a minimalist look can also opt for piped pockets on their everyday suits.

Patch pockets

Are made from separate pieces of the suit fabric stitched directly onto the outside front of the suit jacket or blazer. This suit pocket type is the earliest and most primitive take on pocket construction.

Ticket Pocket

Somewhat lost to history, the ticket pockets back story is rooted (much like most suiting history) to British heritage. During the golden age of train travel, ticket pockets became a popular and practical tailoring request. Men making regular trips between the city and the country stored train tickets in this dedicated pocket to avoid fishing through the main pockets when their tickets were required.

The ticket pocket is typically located just above the standard right pocket (because most people are right-handed) and is slightly narrower than the pocket below it. It can be straight or slanted to match the orientation of the primary pockets.

Functionally, the ticket pocket is of little use today, but it shows appreciation for tailoring tradition and makes a fashion statement for the guy who likes a classic touch on his suit.

Why are suit pockets typically seen/sewn shut?

If you've ever bought a new suit or dress slacks, you've noticed some pockets are sewn shut. The reason for this is purely aesthetic. sewing pockets shut keeps suits looking fresh. You can remove the stitching yourself after buying it, or keep it sewn shut to retain the crisp look.