What is the SAM value for a basic T-shirt?

A basic round-neck T-shirt has a SAM (Standard Allowed Minute) of approximately 8.5 minutes. The range for T-shirts is typically 6 to 27 minutes depending on style complexity — a plain tee falls at the lower end, while a full-print or decorated T-shirt with pockets, labels, and decorative stitching falls at the higher end. Small operations like label attach, thread trim, and pressing together add about 40% to basic sewing estimates.

What is the SAM value for a polo shirt?

A basic short-sleeve polo shirt has a total SAM of approximately 10.39 minutes across about 20 operations, most of which are performed on single needle lockstitch machines. Polo shirts can range from 10 to 34 minutes depending on construction — placket type, collar style, pocket presence, and decorative stitching all add SAM. A men's polo shirt running at 63% line efficiency typically has a SAM value around 26 minutes in measured factory studies.

What is the SAM for a full sleeve formal shirt?

A full sleeve men's formal shirt has a SAM of 22.322 minutes, broken down across 41 individual operations ranging from 0.234 to 1.036 minutes each. This is based on a GSD (General Sewing Data) analysis from a large Indian garment export company documented by OnlineClothingStudy. The operations include collar attach, cuff attach, placket making, button attach, buttonhole, yoke attach, sleeve attach, and side seam — each on its own machine type.

What is the SAM for a basic jeans or 5-pocket denim trouser?

A basic 5-pocket jeans has a total SAM of 11.65 minutes across roughly 25-30 operations, with individual operations ranging from 0.015 to 0.74 minutes. The highest-SAM operations on jeans are waistband attach, back pocket attach with decorative stitching, and zipper insertion. The lowest are simple tasks like thread trim and label attach.

What is the SAM for a formal trouser?

A basic formal trouser has a SAM in the range of 22 to 34 minutes depending on construction details: pleats, pockets, fly construction, waistband type, and lining presence all change the total. The SAM for a plain flat-front trouser falls at the lower end; a pleated trouser with side pockets, back welt pockets, and lining falls at the upper end.

What is the SAM for a jacket or blazer?

Jackets and blazers have SAM values ranging from 66 to 98 minutes — nearly 10x the SAM of a T-shirt. The range reflects construction complexity: a simple unstructured jacket falls closer to 66 minutes; a fully lined structured blazer with canvas interfacing, welt pockets, and hand-finished details falls closer to 98 minutes. Jackets are the most SAM-intensive common garment in a factory that does not produce outerwear or formal wear.

How are SAM values used in a garment factory?

SAM values drive five core factory calculations: (1) Line capacity planning — how many pieces can N operators produce in a shift; (2) CMT price quoting — multiplying SAM by Cost Per Minute gives the labor cost for the order; (3) Operator efficiency measurement — (actual pieces × SAM) / minutes worked; (4) Piece-rate payment — base pay is derived from SAM and factory minute cost; (5) Line balancing — matching operators to operations so no station bottlenecks. Without accurate SAM values, all five calculations are guesses.

SAM Values for Basic Garments: T-Shirt, Polo, Shirt, Trouser, Jeans Reference Table

Santosh Rijal

· April 24, 2026 · 9 min read SAM / SMV

Every garment factory owner and production planner at some point needs a SAM reference table. You are quoting a new buyer, planning a line, or estimating capacity for an order, and you need to know: how long does a basic T-shirt actually take? A polo shirt? A formal shirt? The Standard Allowed Minute (SAM) values below are compiled from industry-standard GSD (General Sewing Data) studies and published operation breakdowns by practitioners in Indian, Bangladeshi, and global garment factories.

Before the table: these values are reference points. Your actual SAM will vary based on fabric type, construction complexity, machine speed, operator skill, and workstation layout. A plain T-shirt with just a round neck binding takes far less than a T-shirt with piping, a chest pocket, and a decorative back yoke. Use these as a starting point for quoting and line planning, then validate with your own time studies.

SAM Reference Table for Common Garments

Garment Type	Typical SAM (minutes)	Operation Count	Primary Machines
Basic round-neck T-shirt	8.5 (range 6–27)	12–18	5-thread overlock, single needle, flatlock
Polo shirt (short sleeve)	10.39 (range 10–26)	~20	Single needle (most), overlock, buttonhole, button attach
Polo shirt (long sleeve)	14–34	22–28	Single needle, overlock, buttonhole, kansai
Men's formal half-sleeve shirt	14–18	28–34	Single needle, buttonhole, button attach, overlock
Men's formal full-sleeve shirt	22.3 (range 22–26)	41	Single needle, buttonhole, button attach, overlock
Basic 5-pocket jeans	11.65	25–30	Single needle, double needle, chainstitch, kansai, bartack
Formal trouser	22–34	30–45	Single needle, overlock, button attach, bartack
Cargo / chino trouser	28–40	35–50	Single needle, double needle, bartack, buttonhole
Basic jacket (unstructured)	66–75	60–70	Single needle, overlock, blindstitch, button attach
Structured blazer (lined)	85–98	75–90	Single needle, blindstitch, hand stitch, button attach
Boxer shorts	4–6	8–12	Overlock, flatlock, single needle
Sweatpants / jogger	9–13	14–20	Overlock, flatlock, kansai, single needle
Hoodie (pullover)	18–24	22–30	Overlock, flatlock, single needle, bartack

Sources: OnlineClothingStudy SAM reference data, full sleeve formal shirt GSD breakdown (41 operations, 22.322 SAM), basic jeans operation breakdown, and Textile Learner SAM calculation guide.

Operation Breakdown: Basic T-Shirt (8.5 SAM)

Here is how the 8.5 minutes SAM of a basic T-shirt is typically distributed across operations. This breakdown matches what is documented in industry-standard T-shirt operation bulletins:

Operation	Machine	SAM (min)
Shoulder join	5-thread overlock	0.45
Neck tape attach	Single needle	0.55
Neck rib attach	5-thread overlock	0.70
Neck topstitch	Flatlock / single needle	0.60
Sleeve hem	Flatlock	0.50 × 2 = 1.00
Sleeve attach	5-thread overlock	0.55 × 2 = 1.10
Side seam	5-thread overlock	0.60 × 2 = 1.20
Bottom hem	Flatlock	0.75
Main label attach	Single needle	0.35
Care label attach	Single needle	0.30
Thread trim and inspection	Manual	0.50
Total		~8.5 min

Note that sleeve operations happen twice (left and right), as do side seams. A flatlock cover-stitch is used for hems because it creates the stretchy, durable double-needle finish that knit fabrics need. The overlock does all edge-closing operations.

Operation Breakdown: Basic Polo Shirt (10.39 SAM)

The polo shirt operation breakdown by ORDNUR and OnlineClothingStudy documents approximately 20 operations. The polo is more SAM-intensive than a T-shirt because of the placket (front opening with buttons) and the collar attach:

Placket making — Single needle, ~1.2 min (most SAM-intensive operation on a polo)
Collar making and attach — Single needle, ~1.5 min combined
Button attach and buttonhole — Specialized machines, ~0.8 min combined
Shoulder, sleeve, side seam, hem — Same as T-shirt, ~5 min combined
Labels, trim, inspection — Manual + single needle, ~1.4 min

Operation Breakdown: Full Sleeve Formal Shirt (22.322 SAM)

The formal shirt is where SAM complexity jumps. The detailed 41-operation breakdown on OnlineClothingStudy was produced by a GSD practitioner at a large Indian garment export company. Key operations by SAM:

Operation Group	Operations	SAM (min)
Collar preparation and attach	Collar make, runstitch, attach	~3.5
Cuff preparation and attach	Cuff make, attach, topstitch × 2	~4.0
Placket and front assembly	Placket make, attach, topstitch	~2.8
Yoke and back assembly	Yoke attach, back pleat, topstitch	~2.2
Sleeve attach and side seam	Sleeve attach × 2, side seam	~3.5
Buttons and buttonholes	BH × 7, BS × 7	~2.8
Hemming, finishing, trim	Bottom hem, thread trim, inspection	~3.5
Total	41 operations	22.322 min

Why SAM Values Vary Between Factories

The same basic T-shirt can have a SAM of 6 minutes in one factory and 12 minutes in another. The variation comes from:

Machine speed: A newer single-needle running at 5,000 RPM completes an operation faster than an older machine running at 3,500 RPM.
Workstation layout: If the operator has to reach across the table to pick up the next bundle, that transfer time adds to SAM.
Fabric handling: Slippery synthetic fabrics take longer to align than stable cotton knits.
Operator skill level: SAM is designed to be operator-neutral (it assumes standard performance), but the underlying GSD motion study depends on which motions the typical operator actually uses.
Bundle size: Smaller bundles mean more pick-up and put-down time per piece relative to sewing time. Larger bundles amortize setup across more pieces.
Attachments and work aids: A folder attachment on the overlock for neck binding cuts SAM by 20-30%. A guide on the single needle for topstitching cuts that operation's SAM similarly.

How to Use These SAM Values in Practice

1. Quoting a new order

SAM × Cost Per Minute (CPM) gives you the labor cost for one garment. If your factory CPM is NPR 3.00 and the garment is a basic polo (SAM 10.39), labor cost per piece is NPR 31.17. Add overhead, margin, and trim allowance to get your CMT quote.

2. Planning line capacity

Available minutes per line per day = operators × shift minutes × efficiency. For a 40-operator line at 70% efficiency in a 480-minute shift: 40 × 480 × 0.70 = 13,440 productive minutes/day. Divide by the garment's SAM to get daily line capacity. For a basic T-shirt (8.5 SAM): 13,440 / 8.5 = 1,581 pieces/day.

3. Setting piece-rate payments

The base rate per piece = SAM × target CPM for operator wages. If your target operator CPM is NPR 1.50 (which becomes NPR 3.00 at the factory level after overhead), a piece with SAM 2.0 pays a base of NPR 3.00 per piece. See our piece-rate payment calculation guide for the full formula including skill multipliers and machine bonuses.

4. Measuring operator efficiency

Operator efficiency % = (actual pieces × SAM) / minutes worked × 100. An operator completing 220 pieces of a 2-minute SAM operation in a 480-minute shift has efficiency of (220 × 2) / 480 × 100 = 91.7%.

How to Calculate SAM Yourself

The values above are reference points. For any new style, you should run a time study in your own factory. The quick method:

Observe the operation on 10 consecutive bundles with a stopwatch. Record time per piece.
Average the observed times to get Average Cycle Time (ACT).
Rate the operator's performance (100% = standard pace). If faster, rating > 100%; if slower, < 100%.
Calculate basic time: Basic Time = ACT × (Rating / 100).
Add allowances: Bundle allowance 10% + Machine/Personal allowance 20% = 30% total.
Final: SAM = Basic Time × 1.30.

For a full walkthrough with worked examples, see our SAM / SMV calculation guide. For comparing SMV software options (GSDCost, SewEasy, stopwatch), see the SMV calculation software guide.

A Practical Note on Reference SAM Values

When a new merchandiser hands me a SAM value "from the merchandising department" for a style we have never made, I treat it as a starting point for quoting — but never as the final number. The actual SAM can only be established by running the style on our own line with our own operators for at least two lots. The reference values in this article are for quoting and capacity planning. They are not a substitute for your own time studies on your own floor.

The factories I have watched run into trouble are the ones that accepted a buyer's quoted SAM at face value, built their CMT pricing around it, and then discovered halfway through production that the actual SAM is 30% higher — eating their margin completely. A 60-minute SAM study on a sample piece before accepting the order prevents this.

Santosh Rijal is the founder of Scan ERP, a garment manufacturing ERP system. This article draws on published operation breakdowns from OnlineClothingStudy, Textile Learner, ORDNUR, and Apparel Resources combined with practical experience in Nepali garment factories.