How are pockets classified?
Pockets are best grouped not by the garment they sit on but by how they are constructed, because construction decides the difficulty, the look, and the spec. There are three families: applied, set-in, and in-seam, plus the inset pocket on trouser fronts.
An applied pocket is sewn onto the surface. A set-in pocket is cut into the garment and finished with welts. An in-seam pocket hides inside a seam. The names that confuse people, welt, jetted, besom, all belong to the set-in family.
The pocket is a quiet marker of a garment's level. A hand-finished welt costs far more in labour than a topstitched patch, so the pocket a designer chooses signals where the piece sits, before anyone reads a label.
This guide takes those families in order of formality and difficulty, then the hidden pocket bag, and how a pocket is specced and chosen.
Applied pockets: the patch pocket
A patch pocket is a piece of fabric sewn onto the outside of the garment, like a small bag on the surface. It is the simplest to make and the most visible, which reads as casual.
- Patch pocket: cut in the garment fabric, edges turned under, and topstitched on. The back pockets on jeans and the pockets on a casual shirt or safari jacket are patch pockets. A lining or a self-facing at the mouth keeps the top edge clean.
- Flap patch: a patch pocket with a flap over the opening, adding a little cover and a more finished look. Common on field and utility jackets.
- Bellows and cargo: a patch pocket with pleated or gusseted sides that expand for volume, so it holds more without gaping. Cargo trousers and field jackets use them.
- Kangaroo: a single large patch pocket across the front with an opening at each side, the signature of a hoodie, sewn down on three sides with the two openings left free.
Patch pockets are forgiving to sew and cheap to produce, but the topstitching is on show, so placement and stitch quality are the whole job. On a curved patch the seam allowance has to be eased or notched to lie flat, and sharp corners have to match left and right.
Set-in pockets: the welt family
A set-in pocket is cut into the garment and finished with fabric lips, called welts, around the slit. Only the opening shows; the bag sits inside. This is the formal, tailored pocket, and the hardest to make.
The naming trips people up, so here it is plainly.
- Single welt: one welt lip finishing the slit. The classic jacket breast pocket is a single welt.
- Double welt, besom, or jetted: two narrow welt lips meeting at the slit. These three names describe the same pocket, used on trouser backs and jacket hips.
- Flap pocket: a jetted pocket with a flap added over the opening. The standard jacket hip pocket, formal but practical.
All of these are cut into the garment, so they need interfacing to stabilise the slit, precise marking, and clean corners. A welt pocket is where construction skill shows, and a badly cut one cannot be undone, because the slit is already in the shell.
On a lined jacket the pocket bag hangs between the shell and the lining, so a welt pocket is finished from the inside before the lining goes in. On unlined trousers the besom back pocket is finished with a facing and the bag hangs free inside the leg.
The Western smile pocket, a curved welt with piping and arrowhead reinforcements, is a decorative variant of the same idea.
Two set-in variants recur on tailoring. The ticket pocket is a small extra flap pocket above the right hip pocket, a hacking-jacket detail. The welted chest pocket, the breast pocket every suit jacket carries, is a single welt angled slightly, and its origins lie with the handkerchief.
In-seam and inset pockets
The last family hides the pocket in a seam or behind the front of trousers, so the garment line stays clean.
- In-seam pocket: sewn into a seam, usually the side seam of a skirt, dress, or trousers. The opening follows the seam and is nearly invisible, and the bag hangs inside. The opening is often stay-taped so it does not stretch.
- Inset or slant pocket: the front pocket of jeans and trousers, where the opening is cut into the front panel and faced, with the bag behind. A slanted or curved version is the standard trouser front, and the facing that shows behind the opening is cut in the shell fabric so no pocketing peeks out.
- Coin or watch pocket: the small pocket inset into the right front of jeans, originally for a pocket watch, also called a fob pocket. It survives as a signature five-pocket detail long after the watch.
In-seam and inset pockets are moderate to sew: hidden, but they depend on a clean opening, a well-shaped bag, and an opening that will not gape or stretch.
The pocket bag: pocketing fabric
Every set-in, in-seam, and inset pocket needs a bag, and the bag is cut from a separate cloth called pocketing, or Silesia. It is a spec item in its own right, not an afterthought.
Pocketing is a strong, finely woven cotton or cotton-blend, such as poly-cotton, that is lighter than the shell so it does not add bulk. It has to survive keys, coins, hands, and repeated washing without tearing or fraying at the seams. A softer premium trouser and a rugged workwear pocket call for very different pocketing weights.
The right pocketing depends on the garment: a fine trouser, stone-washed denim, and heavy workwear each need a different weight and quality. On washed denim, the pocketing has to take the same wash as the shell, or it shrinks and puckers the front.
Pockets, stress, and quality
A pocket carries load and takes constant hand movement, so it is one of the first places a garment fails, and one of the most common reasons a piece is returned. Most pocket faults are predictable, and the spec is written to prevent them before the sample is even cut.
- Opening stretch: the mouth of an in-seam or inset pocket stretches out of shape with use, which is why the opening is stay-taped and, on a welt, interfaced.
- Corner burst: the ends of a pocket opening take the most strain, so they are reinforced, by a bar tack on jeans and casualwear or by hand-worked bar tacks and arrowheads on tailoring.
- Bag failure: a bag in pocketing that is too light tears at the seams under keys and coins, so the pocketing weight and seam type are matched to the expected load rather than chosen on price alone.
- Symmetry: paired pockets that sit at different heights or angles are an immediate quality fault, which is why placement is graded and checked left against right.
How to spec a pocket in a tech pack
On a tech pack, a pocket is a set of decisions, not a picture. A full spec means the factory builds the same pocket every time.
A pocket line typically carries:
- Type and construction: patch, welt, jetted, in-seam, or inset, which sets the method and most of the labour cost.
- Position: the placement, measured from seams or the high point of the shoulder and graded across the size range so it stays balanced.
- Opening and welt width: the finished opening width, and, for a set-in pocket, the welt width, since a wide welt reads very differently from a narrow one.
- Bag shape and pocketing: the bag depth and shape, and the pocketing fabric, weight, and colour, matched to the shell and the wash.
- Topstitch and reinforcement: topstitch colour, gauge, and rows, and the reinforcement at the opening, a bar tack on jeans and casualwear, since the mouth takes the most stress in wear.
A pocket is set into or onto a seam, and it is one more line in the tech pack that runs through textile manufacturing: a type, a position, and a tolerance.
How to choose the right pocket
Work from the garment and the formality. Casual and visible points to a patch; tailored and clean points to a welt; a hidden pocket points to an in-seam. Cost follows the same line, since a welt takes far more labour than a patch, so the choice is a budget decision as well as a design one.
- Casual shirts, sport coats, cargos: patch pockets, plain or with a flap or bellows.
- Tailoring, trousers, blazers: welt and jetted pockets, with a flap on the hip.
- Skirts and dresses: in-seam pockets for an invisible opening.
- Jeans and trousers: inset front pockets and patch backs, plus the coin pocket, all reinforced with bar tacks.
- Hoodies and casual tops: the kangaroo pocket, sewn down on three sides with two open ends.
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