{"id":9340,"date":"2026-01-25T17:13:28","date_gmt":"2026-01-25T10:13:28","guid":{"rendered":"https:\/\/mekonggarment.com\/?p=9340"},"modified":"2026-01-25T17:42:36","modified_gmt":"2026-01-25T10:42:36","slug":"how-the-tex-system-measures-thread-thickness","status":"publish","type":"post","link":"https:\/\/mekonggarment.com\/es\/how-the-tex-system-measures-thread-thickness\/","title":{"rendered":"How the \u201cTex\u201d System Measures Thread Thickness ?"},"content":{"rendered":"<p data-pm-slice=\"0 0 []\">If you\u2019ve ever seen <strong>Tex 27, Tex 40, or Tex 60<\/strong> on a thread cone, that number is not a \u201cmystery thickness code.\u201d It\u2019s a simple weight-per-length system. But here\u2019s the catch: Tex measures mass, not diameter, so \u201cthicker\u201d is usually true but not guaranteed.<\/p>\n<p data-pm-slice=\"0 0 []\"><strong>=&gt; Related Article:<\/strong> <a href=\"https:\/\/mekonggarment.com\/es\/sewing-thread-specifications-in-the-garment-industry\/\">Sewing Thread Specifications in the Garment Industry<\/a><\/p>\n<h2 data-pm-slice=\"0 0 []\">What is Tex, in plain words?<\/h2>\n<p>Tex is a thread size system based on weight. It tells you <strong>how many grams 1,000 meters <\/strong>of thread weighs. <strong>So:<\/strong><\/p>\n<ul>\n<li><strong>Tex 25<\/strong> means <strong>1,000 m<\/strong> weighs<strong> 25 g<\/strong><\/li>\n<li><strong>Tex 60<\/strong> means <strong>1,000 m<\/strong> weighs <strong>60 g<\/strong><\/li>\n<\/ul>\n<p>This is why Tex is called a direct numbering system: higher number = heavier thread per same length.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5756 aligncenter\" src=\"http:\/\/mekonggarment.com\/wp-content\/uploads\/2025\/11\/Thread-Thickness-1.webp\" alt=\"\" width=\"528\" height=\"300\" srcset=\"https:\/\/mekonggarment.com\/wp-content\/uploads\/2025\/11\/Thread-Thickness-1.webp 528w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2025\/11\/Thread-Thickness-1-430x244.webp 430w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2025\/11\/Thread-Thickness-1-150x85.webp 150w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><\/p>\n<h2 data-pm-slice=\"0 0 []\">The Exact Definition (the \u201cmath truth\u201d)<\/h2>\n<p>Tex is a form of linear density (mass per unit length). Standards describe linear density as the mass per unit length of a yarn, expressed in tex (and related units). <strong>The two formulas you\u2019ll actually use:\u00a0<\/strong><\/p>\n<h3>A) If you know Tex and length<\/h3>\n<p data-pm-slice=\"0 0 []\"><strong>Weight (g)<\/strong> = Tex \u00d7 Length (m) \u00f7 1,000<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9341\" src=\"http:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX.webp\" alt=\"\" width=\"845\" height=\"175\" srcset=\"https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX.webp 845w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-250x52.webp 250w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-430x89.webp 430w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-700x145.webp 700w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-150x31.webp 150w\" sizes=\"auto, (max-width: 845px) 100vw, 845px\" \/><\/p>\n<p><strong data-start=\"2183\" data-end=\"2195\">Example:<\/strong> Tex 30, length 250 m. Weight = 30 \u00d7 250 \/ 1000 = <strong data-start=\"2246\" data-end=\"2255\">7.5 g<\/strong><\/p>\n<h3>B) If you know weight and length<\/h3>\n<p data-pm-slice=\"0 0 []\"><strong>Tex<\/strong> = Weight (g) \u00d7 1,000 \u00f7 Length (m)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9342\" src=\"http:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-1.webp\" alt=\"\" width=\"800\" height=\"180\" srcset=\"https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-1.webp 800w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-1-250x56.webp 250w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-1-430x97.webp 430w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-1-700x158.webp 700w, https:\/\/mekonggarment.com\/wp-content\/uploads\/2026\/01\/Formulas-TEX-1-150x34.webp 150w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>How Tex is Used in Real Factories<\/h2>\n<table>\n<thead>\n<tr>\n<th>Use case<\/th>\n<th align=\"right\">Typical \u201cfeel\u201d<\/th>\n<th align=\"right\">Common Tex range<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Light fabric seams, neat stitch<\/td>\n<td align=\"right\">fine<\/td>\n<td align=\"right\">Tex 18\u201324<\/td>\n<\/tr>\n<tr>\n<td>General garment seams<\/td>\n<td align=\"right\">medium<\/td>\n<td align=\"right\">Tex 27\u201340<\/td>\n<\/tr>\n<tr>\n<td>Heavy seams, workwear<\/td>\n<td align=\"right\">thick\/strong<\/td>\n<td align=\"right\">Tex 45\u201370<\/td>\n<\/tr>\n<tr>\n<td>Decorative topstitch<\/td>\n<td align=\"right\">very bold<\/td>\n<td align=\"right\">Tex 80+<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 data-pm-slice=\"0 0 []\">Sourcing and Specs<\/h3>\n<p>When you write thread in a BOM or tech pack, Tex helps you avoid vague words like \u201cmedium thread.\u201d Example spec lines:<\/p>\n<ul>\n<li><strong>Sewing thread:<\/strong> Poly core-spun, Tex 40<\/li>\n<li><strong>Topstitch thread:<\/strong> Poly, Tex 60<\/li>\n<li><strong>Heavy duty seams:<\/strong> Bonded nylon, Tex 70<\/li>\n<\/ul>\n<p>Many thread companies prefer Tex because it\u2019s consistent and easy to communicate across factories and countries.<\/p>\n<h3 data-pm-slice=\"0 0 []\">Matching Thread Size to Use (practical ranges)<\/h3>\n<p>This is a rule-of-thumb map (always test, but it\u2019s a good start):<\/p>\n<ul>\n<li><strong>Tex 18\u201325:<\/strong> fine seams, light fabrics<\/li>\n<li><strong>Tex 25\u201340:<\/strong> general garment seams (common \u201cworkhorse\u201d zone)<\/li>\n<li><strong>Tex 40+:<\/strong> heavier seams, stronger visual stitch, workwear<\/li>\n<li><strong>Tex 80+:<\/strong> bold topstitch \/ very heavy duty<\/li>\n<\/ul>\n<p>Even retail thread suppliers describe similar \u201clight\/medium\/heavy\u201d Tex ranges.<\/p>\n<h3 data-pm-slice=\"0 0 []\">Sewing setup (where Tex really matters)<\/h3>\n<p>If you increase Tex and change nothing else, you can get:<\/p>\n<ul>\n<li>skipped stitches<\/li>\n<li>puckering<\/li>\n<li>frequent breaks<\/li>\n<li>ugly loops \/ tension issues<\/li>\n<\/ul>\n<p><strong><a href=\"https:\/\/mekonggarment.com\/es\/why-are-fabric-moqs-usually-higher-than-garment-moqs\/\" data-wpil-monitor-id=\"2786\">Higher Tex usually<\/a> needs:<\/strong><\/p>\n<ul>\n<li>a bigger needle<\/li>\n<li>adjusted tension<\/li>\n<li>possibly different stitch density (SPI)<\/li>\n<\/ul>\n<p>Tex doesn\u2019t <em>\u201cguarantee strength,\u201d<\/em> either. Strength depends on fiber and construction, not just size.<\/p>\n<h2 data-pm-slice=\"0 0 []\">Common mistakes (and how to avoid them)<\/h2>\n<h3><strong>Mistake 1:<\/strong> \u201cSame Tex = same thickness look\u201d<\/h3>\n<p>Not always. A cotton spun thread and a polyester filament thread can behave and look different at similar Tex.<\/p>\n<p><strong>=&gt; Always request: <\/strong>fiber type, construction (spun\/filament\/core-spun), finish (bonded or not)<\/p>\n<h3><strong>Mistake 2:<\/strong> Choosing Tex by \u201cstrength\u201d only<\/h3>\n<p>Tex is size.\u00a0 Strength also depends on: material (nylon vs poly), tenacity, bonding\/finish, seam design<\/p>\n<p><strong>=&gt; Fix Mistake 2:<\/strong> For critical products (bags, workwear, load-bearing seams), ask for breaking strength data and run seam tests.<\/p>\n<h3>Mistake 3: Ignoring machine limits<\/h3>\n<p>Some home or light industrial setups struggle with heavy Tex threads.<\/p>\n<p><strong>=&gt; Fix Mistake 3:<\/strong> Choose thread size based on what your machine + needle + fabric can run cleanly, then scale up only if needed.<\/p>\n<h2 data-pm-slice=\"0 0 []\">Conclusion: The smart way to use Tex<\/h2>\n<p>Tex is the best \u201ccommon language\u201d for thread size because it\u2019s direct and easy: grams per 1,000 meters. But if you treat Tex as \u201cdiameter,\u201d you\u2019ll get burned because construction and fiber can change the look and sewing behavior. Use Tex as your anchor, then lock the outcome with construction details and stitch-out approval. That\u2019s how <a href=\"https:\/\/mekonggarment.com\/es\/what-is-a-counter-sample-in-garment-manufacturing-and-why-brand-owners-need-it\/\" data-wpil-monitor-id=\"2785\">brand owners<\/a> keep quality consistent across suppliers and seasons.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve ever seen Tex 27, Tex 40, or Tex 60 on a thread cone, that number is not a<\/p>","protected":false},"author":1,"featured_media":5756,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[124],"tags":[62,67,66,68,74],"class_list":["post-9340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread","tag-fashion-education","tag-fibers","tag-textile-materials","tag-textiles","tag-thread"],"_links":{"self":[{"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/posts\/9340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/comments?post=9340"}],"version-history":[{"count":0,"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/posts\/9340\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/media\/5756"}],"wp:attachment":[{"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/media?parent=9340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/categories?post=9340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mekonggarment.com\/es\/wp-json\/wp\/v2\/tags?post=9340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}