Garment dyeing shrinks the piece before it ever reaches your customer. In 100% cotton knits, plan on a few percent in width and often more in length. The exact number depends on fabric weight, knit structure and the dye house’s process. Brands that handle this well do three things: they design the pattern with a shrinkage allowance, they approve the size chart on the dyed and washed garment, and they print the care label for the garment they actually ship. This guide walks through each step for brand owners, designers, teams and event organizers who order garment-dyed apparel in volume.
TL;DR
- Shrinkage in garment dyeing happens after sewing, mostly in the heated, agitated dye bath and in drying, so the finished piece is already largely pre-shrunk.
- Typical ranges for garment-dyed cotton run from a few percent up to 6-8% in length for heavy tees, and knits shrink more in length than in width.
- Fiber and knit matter: cotton moves more than polyester, and double-knit structures such as interlock move least.
- Measure the dyed garment, not the flat pattern, when you approve sizing. Cut the pattern larger by an allowance set from a test.
- Tumble drying releases all remaining shrinkage; line drying releases mainly the elastic part. Label accordingly.
Table of Contents
- What actually happens to a garment in the dye bath
- How much shrinkage to expect
- Why fiber, knit and garment design change the result
- What happens when your customer washes it
- How to plan for shrinkage before production
- Which garments to start with
- Our perspective
- Order garment-dyed apparel with print and branding in one place
- FAQ
- Sources
What actually happens to a garment in the dye bath
In piece-dyeing a fabric is colored first and cut afterward. In garment dyeing the order flips: the fabric is cut and sewn into a finished garment, and the garment is then dyed in a rotary drum or paddle machine, washed, softened, dried and pressed. The Cotton Incorporated technical bulletin on garment dyeing of cotton apparel describes this sequence and places the shrinkage mainly in the dyeing and drying stages.
Why does it shrink? Fabric is stretched and held under tension while it is knitted, finished and sewn. Water, heat and tumbling let the fibers and yarns relax back toward their natural dimensions. Cotton absorbs a lot of water, so its fibers swell and the structure reorganizes. A garment-dye cycle puts the finished piece through exactly that, in one controlled pass.
That is also why garment-dyed pieces feel the way they do: soft, slightly lived-in, with natural variation in shade. The same process that creates that look is the one that shrinks the garment, so shrinkage is part of the product, not a defect.
If you are still deciding between dyeing finished garments and dyeing the fabric first, our breakdown of garment dye versus piece dye covers the trade-offs for brand owners.
How much shrinkage to expect
There is no single number. The published figures vary with fabric, garment type and process, so treat them as ranges to test against, not promises.
| Source | What it measured | Result |
|---|---|---|
| Cotton Inc. technical bulletin | 100% cotton pant, through garment dyeing | 1.3% length, 2.2% width |
| Same bulletin | 100% cotton shirt | 22.3% length, 5.6% width |
| Same bulletin | Fabric | 12.6% length, 0.5% growth in width |
| Smart Pattern Making | Natural fibers not stabilized beforehand | Up to 5-7% |
Two lessons come out of this table. First, the spread is enormous: a woven pant and a knit shirt in the same study behaved very differently. Second, length and width do not move equally. Knits usually lose more length than width, so a tee gets shorter before it gets narrower. When a brand says a style “ran short after dyeing,” this is usually the reason.
The same source notes that shrinkage under roughly 2-3% is usually acceptable to consumers, while more than 3% often leads to dissatisfaction. That is the target for the garment your customer washes at home: most of the movement should already have happened before it ships.
What the numbers mean for a tee
Take a 28-inch body length. A 6% loss in length takes about 1.7 inches off it. That can move a tee from a relaxed fit to a cropped one. A 5% loss in a 20-inch chest width takes a full inch off one side, two inches around the body. These are illustrations of arithmetic, not a forecast for any specific garment, but they show why a size chart written from the flat pattern will not match the dyed piece.
Why fiber, knit and garment design change the result
Fiber content
A peer-reviewed comparison of knit fabrics (Yıldırım et al., 2025) found that 100% polyester single jersey changed by about 1% after washing, while 100% cotton reached shrinkage of up to 5.4%. The researchers tie the difference to moisture: polyester absorbs little, cotton absorbs a lot and its fibers swell. If dimensional stability is a priority, a polyester blend moves less than pure cotton, though it will take pigment and feel differently.
Academic work on polyester-cotton blends points the same direction: more polyester improves dimensional stability, while more cotton improves air permeability, drape and soft handle. Pick the blend for the product you are selling, then size for it.
Knit structure
The same 2025 study found interlock, a double-knit construction, had the lowest shrinkage across fiber compositions, while a 1x1 rib in a cellulosic fiber reached 7.3%. Structure matters as much as fiber. A heavy single-jersey tee, a fleece sweatshirt and a rib-knit cuff will each move differently, even in one dye lot.
Construction versus processing shrinkage
Cotton Inc.'s guide to improving shrinkage performance of cotton fabrics splits shrinkage into two types. Construction shrinkage comes from how the yarn and fabric were built. Processing shrinkage comes from forces applied during dyeing, finishing and manufacturing. Garment dyeing adds a large dose of processing shrinkage after the fabric is already knitted and finished.
The guide also separates elastic shrinkage, which comes back when stress is relieved, from plastic shrinkage, which does not. Wet processing can stretch fabric beyond its elastic limit and permanently change its relaxed dimensions. Methods such as relaxation drying, compaction and crosslinking reduce what is left, according to CottonWorks.
What happens when your customer washes it
A garment that has been through hot, wet, tumbling processing at the dye house has already given up much of its available shrinkage. That does not mean zero. How the customer dries it decides the rest: Cotton Inc. notes that line or flat drying mainly realizes elastic shrinkage, while tumble drying realizes all of the available residual shrinkage.
For a brand, this has practical consequences:
- Print the care instructions for the dyed garment. Cold wash and low tumble or line dry is the safe default for cotton.
- Describe the fit honestly on the product page. Give measurements of the finished, dyed garment, not the pre-dye pattern.
- Test the way your customers launder. The Cotton Inc. bulletin found that the AATCC 135 home laundering test, run as five hot-wash, warm tumble-dry cycles, closely predicted how 100% cotton garments shrank in garment dyeing. The current AATCC TM135 test measures dimensional change before and after standardized wash cycles, where a negative value means shrinkage and a positive one means growth.
If you sell team uniforms or event staff apparel, this matters even more: a hundred people wash the garments in a hundred different machines, and a stable pre-shrunk base keeps the fit consistent.
How to plan for shrinkage before production
Here is the routine, step by step, with the point where each step usually goes wrong.
1. Pick the fabric and knit for the job
Decide the weight, fiber and structure from the product, not the price. Heavyweight cotton tees give the broad, boxy drape that garment-dyed styles are known for, but they also move more in length. Where the Cotton Inc. guide recommends low-tension processing and relaxation drying for cotton knits, that is a process decision made at the factory, so choose a producer who controls it.
Where it goes wrong: switching fabric between samples and production. A new knit or a new GSM is a new shrinkage profile.
2. Run a shrinkage test before cutting the marker
A test garment or fabric swatch goes through the dye and wash cycle you plan to use, then is measured against the original. Measure length and width separately and measure more than once. Smart Pattern Making’s walkthrough covers the arithmetic for calculating the percentage from marked benchmarks.
Where it goes wrong: testing on a rinse in your kitchen sink, then applying the number to a factory drum cycle. The process in the test must match the process in production.
3. Cut the pattern larger by the allowance
The Cotton Inc. bulletin says garments can be cut oversized to offset shrinkage, with the caveat that seam appearance may be affected. So allowances should be measured and kept modest, not guessed. Keep length and width allowances separate, since knits lose more length.
Where it goes wrong: one blanket percentage for every style. A sweatshirt, a pocket tee and a long sleeve each need their own.
4. Approve sizing on the dyed garment
Take the measurements for your size chart from the finished, dyed and washed sample. Check chest width, body length, sleeve length and neck opening. Approve the size chart only when the dyed sample matches your target spec.
Where it goes wrong: signing off the grade sheet from the pre-dye pattern and discovering the difference in the first shipment.
5. Decorate after dyeing, and confirm the placement
Because the garment settles during dyeing, artwork placement is more reliable when the print goes on the dyed, finished piece. A graphic measured on the flat pattern can land lower or tighter than planned if the piece shrinks afterward. Confirm placement on the sample you approved.
6. Write the care label to match
If the garment is meant to be tumble-dried, test it that way. If you recommend low heat or line drying, say so clearly on the woven or printed label.
Which garments to start with
For brands that want a garment-dyed look without a long development cycle, starting from tested blanks removes the guesswork about base fabric. Tekton LA’s garment-dyed range includes the Garment Dye Shirt, the Garment-Dyed Heavyweight Shirt, the Garment Dyed Sweatshirt, and long-sleeve and pocket versions. Blanks carry no minimum order quantity.
When you add your own label, the private labeling and finishing pricing page lists the options, and woven labels put your brand and care information inside the collar.
Our perspective
Shrinkage is not the enemy in garment dyeing. Surprise is. A brand that knows a style will lose a certain amount in length and plans the pattern around it ends up with a garment that fits the way the size chart says, wash after wash.
We make garments and print them in Los Angeles, and we run garment dyeing under our own Tekton Garment Dye™ process. That puts cutting, dyeing and decoration in one place, which suits the order that matters most: dye first, then decorate the finished piece, so your artwork sits where you designed it.
Our advice to a new brand is simple. Pick the blank, approve the dyed sample, then order in the quantity you need. With no minimums on blanks, you can check how a garment looks and fits before committing to a larger run, and with fast turnaround and same-day or next-day options for urgent jobs, a team or event does not have to wait weeks to find out.
Christian
Order garment-dyed apparel with print and branding in one place
If you are launching a line, outfitting a team or producing merchandise for an event, Tekton LA covers the whole chain in Los Angeles: garment dye, DTG, DTF, screen printing, embroidery, embossing, woven labels and private label finishing. See our services and the DTG pricing, silkscreen pricing and embroidery pricing pages for what each decoration method costs, or look at cut and sew if you want a custom pattern with your own shrinkage allowance built in.
FAQ
Does a garment-dyed shirt keep shrinking after I buy it?
Some, but much less than an undyed shirt, because the dye cycle has already put it through heat, water and tumbling. Tumble drying releases whatever shrinkage is left, while line drying mainly releases the elastic part. Washing cold and drying low keeps the fit closest to the dyed measurements.
How much should I add to the pattern for garment dye shrinkage?
There is no universal figure. Published ranges run from a few percent to 6-8% in length for heavy cotton knits, and width usually moves less than length. Run a test garment through your actual dye and wash cycle, measure it, and set length and width allowances separately for each style.
Does polyester shrink less than cotton in garment dyeing?
Yes. Research comparing knit fabrics found polyester changed by about 1% after washing, against up to 5.4% for 100% cotton, because polyester absorbs far less moisture. Blends fall in between, and knit structure also matters: interlock moved least in the same study.
Is pre-shrunk the same as garment dyed?
Not exactly. Pre-shrunk usually means the fabric was treated before sewing. Garment dyeing treats the finished piece, so the shrinkage that comes from sewn construction is also worked through. Either way, measure the finished garment after dyeing and washing before you approve the size chart.
Sources
- Cotton Incorporated, Garment Dyeing of Cotton Apparel (TRI-3003)
- Cotton Incorporated, A Guide to Improved Shrinkage Performance of Cotton Fabrics (ISP-1009)
- CottonWorks, Shrinkage and Skewing
- Yıldırım et al. (2025), Effect of Ecocell Fiber Blends on Comfort Performance
- Effect of blend ratio on the properties of polyester-cotton fabric
- Smart Pattern Making, How to Calculate Fabric Shrinkage
- AATCC 135 home laundering test method