The 6109 vs. 6110 Line: T-Shirt, Polo, or Sweater?

A knitted upper-body garment belongs in heading 6109 or 6110 on its physical construction, read against the heading text and the Chapter 61 legal notes. The most useful correction on this topic is that a conventional polo is ordinarily not a 6109-versus-6110 choice at all. It routes to the knit shirt headings.

This guide covers what each heading captures, where a polo goes and why, which features move a garment off the T-shirt line, and the three stitch-count tests that get confused with each other. Current through the 2026 HTSUS, Revision 18.

What 6109 and 6110 Actually Cover

Both heading texts are narrower than their commercial equivalents suggest.

The 2026 legal text supplies one express statutory exclusion from heading 6109. Chapter 61 Note 5 states that heading 6109 does not cover garments with a drawstring, ribbed waistband, or other means of tightening at the bottom. That is the cleanest statutory fact for moving a T-shirt-like article out of 6109, and unlike most tests here it does not depend on judgment.

The Court of International Trade treats heading 6109 as an eo nomine provision whose named garments share the identity of undershirts and their adaptations for outerwear. In Victoria’s Secret Direct the court rejected 6109 for a bra top, finding it was not a T-shirt, singlet, tank top or similar garment, and classified it in residual heading 6114. “Similar garments” is not a license to place every knitted upper-body article in 6109.

Heading 6110 runs the other way. It is not a heavy-sweater basket. The Federal Circuit affirmed 6110 treatment for knitted motocross jerseys in LeMans Corp. v. United States, holding that sports use did not convert them into equipment. In Cozy Comfort Co. v. United States the CIT held an oversized knitted hooded article was a pullover in 6110, reasoning from the common meaning of a garment put on over the head. Courts read objective construction, not marketing novelty.

Screen the more specific neighbors first: 6111 for babies’ garments where body height does not exceed 86 cm, 6113 for coated fabrics where Chapter 61 Note 8 gives it priority, 6101 and 6102 where a sherpa or heavyweight fiberfill lining may give a sweater-form garment cold-weather outerwear character, and 6114 as the residual.

Why a Polo Is Usually Neither

A conventional knit polo has a collar, sleeves, and a full or partial opening beginning at the neckline. Those facts satisfy the structural description of a knit shirt in Chapter 61 Note 4, putting it in 6105 for men or boys or 6106 for women or girls, provided the note’s conditions are met.

The primary examples are consistent. NY N094039 classified a women’s polyester polo with a collar, short hemmed sleeves, side slits, hemmed bottom and partial three-button opening in 6106.20.2010 at 32%, its fabric carrying at least 10 stitches per centimeter in both directions. HQ 954130 classified a unisex knit polo in 6105.10.0010, the left-over-right closure determining men’s treatment under the Chapter 61 sex-identification note.

Note 4 also carries exclusions that push garments back out of 6105 and 6106: pockets below the waist, bottom tightening, or an average below 10 stitches per linear centimeter in each direction over at least a 10 cm by 10 cm area.

The word “polo” is unreliable in the other direction too. In HQ H226262, style JC001 had a V neckline with a rib-knit spread or Johnny collar but no described fastening, short hemmed sleeves, a straight hemmed bottom and fabric measuring 30 stitches per 2 cm. CBP treated it as a 6110 pullover. A garment sold as a polo form can be a pullover when it lacks the shirt placket.

 A gap worth knowing before you rely on symmetry here: The research did not locate a primary ruling classifying a standard button-placket polo directly in 6110 solely because it failed Note 4’s stitch-density test. Ordinary polos are verified in 6105 and 6106, and a closure-free Johnny-collar garment is verified in 6110, but that specific low-density, conventional-placket fact pattern remains ruling-dependent. Treat it as a binding-ruling candidate rather than a settled route.

The T-Shirt Baseline, and the Features That Break It

CBP’s apparel terminology guidance describes a T-shirt as an underwear-style garment of lightweight plain jersey or interlock knit, not over 200 g/m², with short close-fitting hemmed sleeves, a hemmed bottom, and a close-fitting or lower round, square, boat or V neckline. A basic T-shirt has no neckline opening, collar, fastenings, drawstring, rib-knit waistband or other bottom tightening.

One caveat to carry: the 200 g/m² figure is CBP administrative terminology adapted from the Explanatory Note. It is not written into Chapter 61 Note 5 or the heading text, and no precedential CIT or Federal Circuit decision was located holding that weight alone decides 6109 against 6110. It is relevant guidance, not a statutory threshold.

Working from that baseline, individual features move a garment as follows:

Decoration needs judging by scale, not presence. HQ 966686 kept cotton garments carrying a small heat-sealed logo in heading 6109. CBP’s guidance applies a feature-accumulation approach: one or two relatively inconspicuous non-T-shirt features may remain within the “similar garments” scope of 6109, while more than two, an exaggerated feature, or a single conspicuous feature may produce a 6110 pullover.

That framework is useful and also the softest thing in this guide. It comes from CBP’s 2008 informed-compliance guidance, not the heading text or the Chapter 61 legal notes, and no current Headquarters ruling applying the feature-count rubric across every listed treatment was located. Close cases belong with current rulings or a binding ruling request, not a feature tally.

Marketing language loses to construction in both directions. NY M80025 described a cotton garment “styled as a T-shirt” weighing more than 200 g/m². NY N263973 classified two products marketed as “Men’s Kyros Tee,” at 30 and 33 stitches per 2 cm, as man-made-fiber pullovers in 6110.30.3053. NY N227797 put a cotton style in 6109.10.0012 as an “other T-shirt” while a polyester style with stand collar and partial zipper went to 6105.20.2010, in the same product group. Garments get classified style by style, which is where classification errors originate.

Three Different Stitch Counts, and What Each Decides

Three separate stitch tests sit in Chapter 61. They use different thresholds and different measurement methods, and answer different questions.

The thresholds are not interchangeable, and the math shows why: 9 stitches per 2 cm equals 4.5 per cm in one measured direction, while Note 4 asks for 10 per cm in each direction over a specified area.

Two rulings show why conflating them misleads:

• NY N297320: classified a cashmere V-neck pullover measuring more than 9 stitches per 2 cm in 6110.12.1060 as an “other” cashmere article, inside heading 6110 rather than moving to 6109.

• NY N241943: classified a wool garment at 5 stitches per 2 cm, with rib-knit stand collar, partial zipper, chest pocket, rib cuffs and rib bottom, as a sweater in 6110.11.0015. Coarse gauge plus classic construction supported the sweater line. Fine gauge did not force the garment out of the heading.

A further ambiguity sits in the schedule. Statistical Note 3 uses “essentially” without defining it numerically, so it does not say how much of a mixed-gauge outer surface may depart from the 9-or-fewer count. Garments with large panels of different gauges may need laboratory review or a binding ruling.

The sequence matters more than the numbers:

• Identify the garment form under the heading text and the legal notes.

• Route collared or placketed shirts to 6105 or 6106, then apply Note 4’s 10-per-cm-in-each-direction test along with the pocket and bottom-finish exclusions.

• If heading 6110 applies, use the 9-per-2-cm rule only to decide whether it reports statistically as a sweater or under an “other” breakout.

• Test the more-than-9-through-18 range only when a 6110 knit-to-shape statistical suffix is under consideration.

What the Rate Difference Actually Is

The commercially useful finding here is counterintuitive: on the ordinary cotton and ordinary man-made-fiber lines, the heading choice changes nothing about the base rate.

Rates are the 2026 Column 1 general rates from Chapter 61, and the comparison assumes an MFN-origin garment with no preference claim, no Chapter 99 additional duty, no safeguard, no quota consequence, and no special content breakout.

Identical base rates do not make the decision cost-free. The ten-digit reporting number, textile category, admissibility treatment, preference and origin rules, and any Chapter 99 overlay can all differ where the ad valorem rate does not.

Handle the wool line carefully: 6109.90.15 is expressly limited to wool garments with long sleeves, while 6110.11.00 is the wool provision for sweaters, pullovers, sweatshirts, vests and similar articles. Do not quote any delta without first fixing fiber composition, the exact subheading facts, origin, entry date, preference status, and Chapter 99 exposure.

Fiber selection has its own trap. Under Section XI Note 2, a Chapter 56 to 63 product is generally treated as consisting wholly of the textile material predominating by weight over each other single material. That is not the same as exceeding 50% of the total: 40% cotton, 35% polyester and 25% wool is cotton-predominant. Where nothing predominates, the material associated with the heading occurring last in numerical order among those equally meriting consideration controls.

The Intake Packet That Makes This Decidable

None of this is answerable from “T-shirt,” “polo,” “sweater,” or “top” on a purchase order. A sealed sample or construction packet needs to carry:

• Fiber percentages by weight, with shell, lining, coating, and trim separated. Where care label and test report differ, record both.

• Knit type per panel: jersey, interlock, piqué, rib, raschel or openwork, terry, fleece, pile.

• Finished fabric weight in g/m², and whether either surface is brushed, napped, piled or looped.

• Front and back images plus close-ups of neckline, collar, placket, closure, pocket, cuff, hem and inside surface.

• Opening length and starting point, closure type, and closure orientation.

• Pocket count, location relative to the waist, dimensions, and whether real or simulated.

• Bottom finish: plain hem, rib band, elastic, drawcord or toggles.

• A stitch-count worksheet recording surface, direction, test area, readings and average.

• Garment dimensions, intended size, sex and age range, and whether it enters as a set.

Those fields map onto Chapter 61 Notes 4, 5, 6, 8 and 9, the statistical notes, and CBP’s published garment definitions. The worksheet earns particular attention, because a bare number is not evidence: the record has to show which test was applied, in which direction, on which surface, over what area.

Where the Decision Has to Be Documented, Not Argued

Two of the three edges here are soft by design. The bottom-tightening exclusion in Note 5 is statutory and reliable. The 200 g/m² ceiling and the feature-accumulation rubric are CBP guidance that rulings use but no legal note states. That asymmetry makes this a documentation problem more than an interpretation one: where the governing fact is a measurement, the defensible position is the one with the worksheet attached.

Practically: record the garment facts at intake rather than reconstructing them when CBP asks, keep the ruling analogues with the decision, note the HTS revision in force at entry, and request a binding ruling where two plausible headings survive the features. Across thousands of styles, that per-style discipline is the whole exercise. Classifying at catalog scale is a different problem from classifying one garment well, and the heading-specific tests here sit on top of the general apparel framework rather than replacing it.

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FAQs

Does more than nine stitches per 2 cm mean the garment is a T-shirt?

No. It means the article ordinarily misses the US statistical definition of a sweater inside heading 6110. It may still be a 6110 pullover, vest or similar article reporting under an “other” breakout. A cashmere V-neck pullover above that count was classified in 6110.12.1060, not moved to 6109.

Do long sleeves move a garment from 6109 to 6110?

Not on their own. Heading 6109 expressly contains a wool provision for garments with long sleeves, and the Explanatory Note allows close-fitting long sleeves. Loose sleeves or conspicuous styling can support 6110, but sleeve length alone does not decide the heading.

Does cotton classification require more than 50% cotton?

No. Section XI Note 2 asks which single textile material predominates by weight over each other individual material. A garment of 40% cotton, 35% polyester and 25% wool is cotton-predominant, because cotton exceeds each of the others individually.

Is the 200 g/m² limit a legal threshold?

No. It is part of CBP’s apparel terminology guidance, adapted from the Explanatory Note, and rulings do use it. It is not written into Chapter 61 Note 5 or the heading text, and no precedential decision was located holding that weight alone decides between the two headings.

Does the classification change if a garment is marketed as a performance polo or athletic top?

Marketing language does not control. Classification follows the physical construction. If the article has a collar, sleeves, and a placket or partial opening beginning at the neckline, it routes to the knit shirt headings under Chapter 61 Note 4 regardless of the athletic or performance label. If it lacks a placket and functions as a pullover, it belongs in 6110. NY N263973 classified garments marketed as “Men’s Kyros Tee” as man-made-fiber pullovers in 6110 on physical construction alone. The hangtag is evidence of nothing.