ZESTLET · OEM / ODM · Private Label
Custom T-Shirt Manufacturer Guide: Fabric, Fit, Printing and Production
A T-shirt looks simple, which is exactly why small specification gaps show up so clearly. A neckline that stretches after two washes, a side seam that twists, a print that cracks or a size that runs short will be noticed by every customer. Working well with a T-shirt manufacturer means deciding the fabric, fit, construction and decoration before production, and approving each of them on a physical sample.
This guide covers what to specify for a custom or private label T-shirt, how the main decoration methods compare, what drives the price, and how a typical development and production run is organised.
Start with the fabric
Most T-shirts are made from single jersey, a knitted fabric with natural stretch. The fibre, yarn and weight decide how the tee feels, drapes, shrinks and takes print.
| Fabric choice | Typical character | Good for |
|---|---|---|
| Combed or ring-spun cotton | Soft, smooth surface, prints well | Retail brands, merchandise, everyday tees |
| Cotton-polyester blend | Less shrinkage and wrinkling, holds shape | Uniform tees, workwear, high-wash use |
| Polyester performance knit | Lightweight, quick drying | Sportswear, training and outdoor base tees |
| Tri-blend | Very soft, vintage drape | Fashion and lifestyle ranges |
Fabric weight is usually given in grams per square metre (GSM). As a rough guide, lightweight tees often sit around 140–160 GSM, mid-weight around 170–190 GSM and heavyweight tees from about 200 GSM upwards. Heavier is not automatically better: it changes drape, warmth and cost, so choose the weight that suits the use and the market.
Ask for shrinkage results on the actual fabric. Cotton jersey can shrink in length after washing, and the pattern should allow for it or the fabric should be pre-shrunk. Our guide to sourcing fabrics and trims explains the approval steps.
Define the fit and size chart
Customers judge a T-shirt mainly by how it fits. Decide the fit family first, then turn it into measurements.
- Regular fit: straight body with room to move; the safest choice for uniform and promotional tees.
- Slim fit: narrower chest and waist, shorter sleeve opening; popular in retail.
- Relaxed or oversized: wider body, dropped shoulder and longer length; needs its own pattern rather than simply grading up.
The size chart should state garment measurements, not body measurements, with tolerances. Key points are chest width, body length from high point shoulder, sleeve length, sleeve opening, neck width, neck drop and hem width. Approve the fit on a real person in your base size before grading the rest of the range, as described in our pattern making and grading guide.
Construction details that decide quality
Two tees made from the same fabric can perform very differently because of how they are sewn. Specify these details in the tech pack:
| Detail | Options | Why it matters |
|---|---|---|
| Neckline | Crew or V-neck; rib width; rib with or without elastane | Rib quality decides whether the neck keeps its shape |
| Neck finish | Shoulder-to-shoulder tape, back neck tape, coverstitch | Taping adds strength and comfort at the neck seam |
| Body | Side-seamed or tubular | Side seams allow a shaped fit and help reduce twisting |
| Hems | Twin-needle coverstitch, single needle, raw edge | Even, flat hems look finished and resist curling |
| Shoulders | Taped or untaped shoulder seams | Taping stops the shoulder seam stretching |
| Labels | Woven neck label, printed neck label, side seam care label | Printed labels are more comfortable; legal content must be correct |
Spirality, where the side seams twist towards the front after washing, is one of the most common T-shirt complaints. It is controlled through fabric quality, cutting along the grain and a proper wash test on the pre-production sample.
Choose the decoration method
Most branded tees carry a print or embroidery. The right method depends on artwork, colours, quantity and the feel you want.
| Method | Best for | Consider |
|---|---|---|
| Screen printing | Bold artwork with a limited number of colours, larger quantities | A screen is made per colour, so very small runs cost more per piece |
| Direct-to-garment (DTG) | Detailed, full-colour artwork and small runs | Works best on cotton-rich fabric; check wash durability |
| Heat transfer | Names, numbers and small logos, mixed sizes | Feel and durability depend on the transfer material |
| Embroidery | Small chest logos with a premium look | Needs stabilising on light jersey to avoid puckering |
Send vector artwork, the Pantone colours, the exact print size and the placement measured from a fixed point such as the high point shoulder or centre front neck. Approve a strike-off on the real fabric colour before bulk. See custom embroidery and patches for decorated uniform and branded programmes.
What drives the price of a T-shirt
- Fabric: fibre, yarn quality, weight and dye colour are usually the largest cost.
- Construction: side seams, taping and rib quality add time and materials.
- Decoration: number of print colours, placements and method.
- Size and colour spread: many colours with few pieces each cost more than a focused range.
- Labels and packing: printed neck labels, swing tags, folding and individual polybags.
- Quantity: fabric dyeing and screen set-up are spread across more pieces in larger runs. Read more in clothing MOQ explained.
How a T-shirt order runs
- Brief and tech pack: fabric, fit, measurements, construction, artwork and labels.
- Fabric and colour approval: swatch, lab dip and shrinkage results.
- Fit sample: checked on a person in the base size; corrections agreed.
- Pre-production sample: made in the bulk fabric with final print, labels and packing.
- Bulk production: cutting, sewing, decoration and finishing with in-line checks.
- Final inspection and packing: measurements, print quality and labels checked against the approved sample before shipment. See quality control and inspection.
Common T-shirt mistakes
- Approving fit on an unwashed sample. Wash it first; shrinkage changes length and fit.
- Choosing fabric by weight alone. Yarn and knit quality matter as much as GSM.
- Print placement written as “centre chest”. Give measurements for every size range.
- Ignoring the neck rib. A cheap rib is the first thing to fail.
- Missing legal labels. Fibre content and care rules depend on the market; see our clothing label requirements guide.
Frequently asked questions
What GSM should my T-shirt be?
Mid-weight jersey suits most uniform and retail tees. Choose lighter fabric for hot climates and layering, and heavier fabric for a premium, structured feel. Compare physical swatches before deciding.
Can I order different sizes and colours in one order?
Yes. The size and colour breakdown affects fabric dyeing and cost, so share it early. Your manufacturer can tell you how minimums apply per colour.
Is DTG or screen printing better?
Screen printing suits bold artwork with few colours and larger quantities. DTG suits detailed full-colour designs and smaller runs. Ask for wash-tested samples of both if you are unsure.
How do I stop T-shirts shrinking?
Use fabric with controlled shrinkage, test it before cutting and build the result into the pattern. Pre-shrunk or blended fabrics shrink less than untreated cotton.
Can ZESTLET make private label T-shirts?
Yes. ZESTLET produces custom and private label T-shirts, including uniform and tactical tees, with your labels, printing or embroidery. Samples are approved before bulk production.
How are T-shirts manufactured?
Yarn is knitted into jersey fabric, which is dyed, finished and checked for shrinkage. The fabric is then laid out and cut to the graded pattern, sewn on overlock and coverstitch machines (shoulders, neck rib, sleeves, side seams and hems), decorated by printing or embroidery, inspected, labelled, folded and packed.
How much does it cost to manufacture T-shirts?
The price per piece depends mainly on fabric quality and weight, construction details, decoration, the size and colour spread and the order quantity. Send your specification and quantities for a quotation based on your actual design rather than a generic price.
Related guidance
This guide is original ZESTLET editorial content based on apparel development practice. Continue with choosing a clothing manufacturer, labels and packaging and small batch clothing manufacturing.