How to Tell if a T-Shirt Is Good Quality: What's Tested and What's Just Advice
C.B. ShawShare
How can you tell if a T-shirt is good quality? Most online checklists mix tested facts with retail folklore. We sorted them. Backed by sources: check the fiber content tag (legally required in the US), look for combed, ring-spun cotton (softer, finer and more even, per Cotton Incorporated), and a tighter knit (less twisting). Widely recommended but untested: heavier fabric, taped shoulder seams, double-needle hems, and a neck rib that bounces back. Price and weight alone are weak signals, as our post on heavier T-shirts explains.
What the research supports
Combed vs carded vs ring-spun
Cotton Incorporated's yarn guide (the cotton industry's research body) explains that all cotton is carded, and combing is an extra step. Combing removes short fibers, neps (tiny knots) and trash, and aligns the fibers, so the yarn has longer fibers and can be finer. Combed yarn needs less twist for the same strength, which makes fabric softer with less twisting (skew). Combed fibers are mainly used in ring-spun yarns. The catch: “combed” on a tag is not a standard grade. The waste removed ranges from 4 to 24 percent, and 16 percent beats 10 percent on the same fiber. Open-end (rotor) spinning is faster, 8 to 10 times the productivity, and cheaper, and in Cotton Incorporated's test gave better evenness and less skew than ring-spun. So ring-spun is not automatically better in every way. Most cotton is “short staple,” 2.5 inches or less, and the vast majority is under 1.5 inches, so “long staple” claims must be judged on that scale. We found no sourced inch threshold for “good.”
Twisting seams
Cotton Incorporated's 2001 bulletin on knit fabrics says skew comes from yarn twist and knit structure. More twist means more skew and a tighter stitch means less. See why shirts twist after washing.
Stitches per inch
A 2022 Sri Lankan university study found 12 to 16 stitches per inch is the normal range for side seams, and that seam strength and drape depend on stitch type and density. It tested a light woven fabric (about 3 oz per square yard), not a T-shirt, so don't treat it as T-shirt testing. Higher is not always better.
Fiber tag
The FTC fiber rules (16 CFR 303) require content disclosed by percent. Always check it.
The checklist, graded
| Check | Status |
|---|---|
| Fiber content tag | Regulated. |
| Combed ring-spun | Supported, but no fixed grade. |
| Stitches per inch | Partly tested. 12 to 16 is normal. |
| Fabric weight | A standard exists (ASTM D3776) but “heavier is better” is untested as a quality predictor. We found no sourced “good tee equals X gsm.” Convert oz per square yard times 33.9 for gsm, or see what GSM means. |
| No side seams (tubular) | Unproven. A seamless tube can still twist. |
| Neck rib / taping / double-needle hem | Widely recommended, untested. |
| Stretch and recover test | Widely recommended, no source for the home test. |
| Hold it to the light | Common sense for see-through, untested. |
| Pre-shrunk | Marketing claim. Expect some shrinkage anyway. |
A cheap-versus-good summary: cheaper yarn means carded or open-end, shorter fibers and looser stitches, which means more skew and pilling (see why shirts pill). Everything else (taped necks, hems, weight) is retail advice with no research we found. A homemade skew test: fold a washed shirt along the side seams, and if the seams spiral forward, it has skew (based on Cotton Incorporated's definition, not a published consumer test).
A bit of history
Ring spinning is credited to John Thorp of Rhode Island in 1828 or 1829, with development by a “Mr. Jencks” of Pawtucket. An 1884 author names Jencks as the inventor, so the credit is contested. The Danforth throstle (1828) was a failed US attempt: the heavy flyer made the spindle vibrate and snarled the yarn. Ring frames only succeeded in the US after the 1830s. Sanforizing, a woven fabric process, is credited to Sanford Lockwood Cluett with a patent around 1930 (a weak source). Knit T-shirts use different relaxing finishes. The US Navy adopted a plain undershirt in 1913, after miners and stevedores had used them in the late 1800s. More in the history of the T-shirt.
Quality myths, graded
- “Ring-spun was invented in 1828 by John Thorp.” Partly true. Credit is contested.
- “Heavier means better.” Unproven.
- “No side seams means better.” Unproven.
- “Combed means high grade.” Misleading. No standard grade.
- “More stitches per inch is always better.” False. There are tradeoffs.
Questions people ask
How do I know if a T-shirt is good quality?
Check the fiber tag, look for combed ring-spun cotton and a tight knit, and test the neck rib's recovery.
What does combed cotton mean?
An extra step after carding that removes short fibers and trash, giving longer, finer, more even yarn.
Is ring-spun better than open-end?
Ring-spun is softer and finer, but open-end skewed less in a Cotton Incorporated test.
Does combed have a standard grade?
No. The amount removed varies from 4 to 24 percent.
Is heavier fabric better?
Unproven as a quality predictor.
How many stitches per inch should a T-shirt have?
12 to 16 is the normal range in one study, but it is not a pass or fail line.
Are tubular T-shirts better?
Unproven. Twisting is yarn and knit related.
Does pre-shrunk mean it won't shrink?
No. It is a marketing claim, so expect some shrinkage.
What is a neps?
Tiny knots of fiber that combing removes.
What is staple length?
The length of cotton fibers. Short staple is 2.5 inches or less.
When did ring spinning start?
Credited to John Thorp in Rhode Island, 1828 or 1829, with development by Mr. Jencks.
From Innocently Insane
Every product page lists fiber percentages and weight, so you can check what we claim.
Keep Following the Thread
Do Heavier T-Shirts Last Longer?
