How to Choose the Right GSM for Single Jersey: A Fabric Weight Guide for T-Shirts, Underwear, and Dresses (130–220 GSM)
Single jersey (cotton jersey) is the lightest, most foundational cotton knit fabric — smooth on both sides, with a clean, flat structure. It's the go-to fabric for t-shirts, long-sleeve tops, underwear, nightgowns, baby bodysuits, and everyday dresses. The two decisions that matter most when sourcing single jersey are GSM (grams per square meter) and fiber content. A 140 GSM jersey and a 200 GSM jersey are, for practical purposes, completely different fabrics suited to completely different end uses. This guide walks through the full GSM range, maps each weight to the right garment, and explains how to read a supplier spec sheet without making costly mistakes.
What Is Single Jersey Fabric?
Single jersey is a weft-knitted fabric with an identical smooth structure on both faces. It's produced on a circular knitting machine from a single yarn system — the yarn travels horizontally, forming successive rows of loops. The resulting fabric is thin, lightweight, and highly breathable.
Key properties of single jersey: two-way stretch of around 20–30% with good recovery, softness, hypoallergenic feel, and a fine hand. What sets it apart from other knit constructions — jersey, 1x1 rib knit, 2x2 rib knit — is the absence of ribbing and its relatively low weight ceiling.
Single jersey is almost exclusively used in base-layer and next-to-skin garments: summer t-shirts, long-sleeve tops, underwear, baby bodysuits, nightgowns, and lightweight dresses. It is not suitable for outerwear or warm-weather layers — for those, look to jersey, interlock knit, or French terry.
Single Jersey GSM Chart
The market broadly divides single jersey into five GSM ranges. Each has its own natural application.
130–140 GSM. The lightest single jersey on the market. Semi-sheer when held to light, exceptionally airy and breathable. Best suited to hot-weather summer t-shirts, nightgowns, lightweight bodysuits, and sheer layering pieces in multi-layer designs. On dark colorways (black, navy) sheerness is minimal; on light colors (white, ecru) it is clearly visible. Typically 100% cotton, no spandex (elastane). For everyday long-sleeve tops or adult t-shirts worn year-round this weight is borderline too light — the fabric can stretch out at elbows and the chest area after 5–10 wash cycles.
145–150 GSM. Light, versatile single jersey. The standard summer weight for t-shirts and long-sleeve tops intended for regular daily wear. Does not show through on dark colors; may show very slightly on white and pastel. Fiber content is typically 100% cotton or 98/2 cotton/spandex (elastane). This weight is ideal for children's bodysuits and pajamas: light, breathable, and non-restrictive.
160–170 GSM. Mid-weight single jersey. A true all-rounder for year-round t-shirts, long-sleeve tops, and basic dresses. Fully opaque in any color, holds its shape wash after wash. Fiber content 100% cotton or 94–96% cotton with 4–6% spandex (elastane). This is the industry workhorse weight for volume production of basic garments.
180–190 GSM. Heavier single jersey. Well suited to year-round long-sleeve tops, structured t-shirts, fitted sheath dresses, and transitional-season baby bodysuits. Fully opaque, holds its shape under active wear. Typically 94–96% cotton with 4–6% spandex (elastane), occasionally 100% cotton. Sits at the boundary between heavier single jersey and lightweight jersey fabric.
200–220 GSM. The heaviest single jersey range. Used for fitted sheath dresses, heavier long-sleeve tops, fine-knit turtlenecks, and the top layer of children's sets. Fiber content is typically 92/8 or 90/10 cotton/spandex (elastane). At this weight the line between single jersey and jersey blurs — a 200 GSM fabric may be listed under either category depending on the supplier, and that's perfectly normal.
Above 220 GSM the fabric is no longer single jersey — it crosses into jersey or interlock knit territory. If a supplier lists "single jersey 240 GSM," it is either a mislabeled product or a heavyweight jersey.
Choosing the Right GSM for Each Garment
GSM selection is always end-use driven.
Hot-weather and beach t-shirts. 130–150 GSM, 100% cotton, no spandex (elastane). Light and breathable, comfortable in high heat. Downside: prone to stretching at elbows and chest after a season of regular wear.
Everyday year-round t-shirts. 160–180 GSM, 100% cotton or 3–5% spandex (elastane). Fully opaque, shape-retaining, and suitable for print applications.
Long-sleeve tops and base-layer sweatshirts. 180–200 GSM with 4–6% spandex (elastane). Close-fitting silhouette with strong recovery over the course of a season.
Fitted sheath dresses. 200–220 GSM with 6–10% spandex (elastane). Firm fit, body-contouring silhouette, fully opaque.
Underwear (briefs, camisoles). 130–160 GSM, 100% cotton or 3–5% spandex (elastane). Fine, soft base fabric; hypoallergenic and non-abrasive against skin.
Nightgowns and pajamas. 130–160 GSM, 100% cotton. Lightweight, breathable, and comfortable against skin for sleep.
Baby bodysuits and newborn sets (0–3 years). 140–160 GSM, 100% cotton, no spandex (elastane). Hypoallergenic fiber content, maximum softness, non-constricting on delicate skin.
Children's sets (3–10 years). 160–180 GSM, 100% cotton or 3–5% spandex (elastane). More durable than the lighter weight; holds its shape during active play.
School turtlenecks and base-layer tops. 170–190 GSM, 95/5 cotton/spandex (elastane). Close fit that does not sag after repeated washing.
Corporate merch and branded merchandise for print. 160–180 GSM, 100% cotton or 80/20 cotton/polyester. Dense, even surface holds a sharp print.
Fiber Content: What to Look For
Fiber content determines how a t-shirt or dress performs after many wash cycles.
Cotton 92–100%. The foundation of single jersey. The higher the cotton content, the softer and more comfortable the fabric feels against skin. For children's wear and underwear, 100% cotton is the standard. For fitted styles, a 95/5 blend with spandex (elastane) makes practical sense.
Spandex (elastane) 3–10%. An optional addition. Without it, single jersey stretches but recovers slowly; after 20–30 washes it can sag at the knees and chest. With spandex (elastane) the fabric holds its shape for years. Use 6–10% for fitted dresses and long-sleeve tops, 3–5% for standard t-shirts, and no spandex (elastane) for loungewear and nightwear.
Polyester 15–30%. Found in volume-market merch and budget garments for cost reduction and durability. Do not use for children's wear or underwear — only for outerwear layers and performance styles.
What to avoid. Rayon (viscose) above 10% in a single jersey construction — it causes irreversible sagging after washing. "Synthetic fiber, type unspecified" in a spec sheet usually indicates up to 60% low-grade polyester, which pills badly within 5–10 wash cycles.
For a detailed breakdown of yarn spinning technologies — open-end cotton (OE), carded cotton, combed cotton, and compact combed cotton — see the guide "OE, Carded, Combed, or Compact Combed Cotton." For volume production of basic garments, carded cotton is the standard; for children's wear and premium lines, use combed cotton or compact combed cotton.
Will It Show Through? How to Test for Opacity
Opacity is one of the most important questions when choosing GSM — especially for light colors and next-to-skin garments.
Light-box test. Hold the fabric up to a window or place a strong light source behind it. Single jersey at 140 GSM in white is noticeably sheer; in black, barely at all. At 170 GSM in white it shows very slightly; in any other color it does not show through. At 190 GSM and above, opacity is complete in all colors.
White paper test. Lay a cut of fabric over a sheet of white paper and check whether the paper is visible through the fabric. This is a less sensitive test but gives a good indication of how the fabric will behave when worn over light-colored garments.
Rule for underwear and beachwear. For next-to-skin underwear and beach cover-ups, use a minimum of 160 GSM or opt for deeper colorways. A 140 GSM white or skin-tone single jersey dress can show through even over underwear in direct light.
Seasonality and Seasonal Demand Patterns
Single jersey works year-round, but demand naturally shifts by season.
Summer (June–August). Peak demand for 130–160 GSM, 100% cotton. Basic t-shirts, nightgowns, baby bodysuits. Wholesale prices for popular dark colorways tend to rise during this period.
Transitional seasons (March–May, September–October). Demand shifts toward 160–190 GSM with spandex (elastane). Base-layer long-sleeve tops worn under jackets, school turtlenecks. The universal production weight for spring and autumn garments.
Winter (November–February). Single jersey is used primarily as an underlayer and base layer. The go-to weight is 160–180 GSM with spandex (elastane). This is also a good time to source the lighter 130–150 GSM weights at favorable wholesale prices, as suppliers clear seasonal stock.
Fabric Consumption: How Much Single Jersey Do You Need?
Standard single jersey roll widths range from 120–185 cm (47–73 in), sometimes supplied as double-width 100 cm × 2 (39 in × 2). Yardage per unit varies considerably depending on production scale.
Individual cut-and-sew (one-off garments):
Production run of 10–50 units in one style:
Cutting allowance. Add 12–15% for individual cut-and-sew, 5–10% for production runs. Single jersey must be cut strictly on the grainline — offcuts cannot be used in seams.
Pricing: Wholesale vs. Retail
Retail pricing for single jersey (buying by the yard or meter from an online retailer or marketplace) is substantially higher than wholesale. As a general guide for international buyers:
Retail (by the meter/yard). 100% cotton single jersey at 140–180 GSM typically retails at a significant premium over wholesale — expect to pay roughly two to three times the wholesale price per meter when buying small quantities through e-commerce platforms. Spandex (elastane) blends at 180–220 GSM command a further premium, and premium compact combed cotton constructions sit at the top of the retail price range.
Wholesale pricing. At wholesale, the cost per meter scales with yarn quality: open-end cotton (OE) is the most affordable, carded cotton sits in the mid range, combed cotton adds a noticeable premium, and compact combed cotton is the most expensive within the single jersey category. Heavier weights with spandex (elastane) — 180–200 GSM — typically cost somewhat more per meter than equivalent lighter weights.
For high-volume production of basic t-shirts destined for e-commerce, 160 GSM carded cotton single jersey offers the best cost-to-quality ratio. For premium capsule collections and children's next-to-skin garments, compact combed cotton at 140–160 GSM is worth the higher unit cost.
Recommended Fabrics by End Use
Hot-weather summer t-shirts, nightgowns, baby bodysuits (0–3 years): Single jersey 140 GSM, 100% cotton, open-end (OE) yarn, black — /products/kulirnaya-glad-140grm2-100hb-1002-oe-antratsit-tr001-kg-cec3c6e0. The most cost-effective summer weight for volume production.
Fitted long-sleeve tops, structured t-shirts with stretch recovery: Single jersey 145 GSM, 98/2 cotton/spandex (elastane), carded cotton, black — /products/kulirnaya-glad-145grm2-98hb2el-120sm-karde-chernyy-19-4007-1-ab12481f. Minimal spandex (elastane) for stretch resistance; the production standard for close-fitting styles.
Year-round all-rounder, premium capsule collections, children's next-to-skin garments: Single jersey 160 GSM, 94/6 cotton/spandex (elastane), compact combed cotton, white — /products/kulirnaya-glad-160grm2-100hb-180sm-pene-201-bombacio-belyys5-f583eea2. Top-tier compact combed cotton construction; resists pilling even after many wash cycles.
Heavier long-sleeve tops, everyday dresses, school clothing, e-commerce merch: Single jersey 190 GSM, 94/6 cotton/spandex (elastane), carded cotton, black — /products/kulirnaya-glad-190grm2-100hb-160sm-karde-olivkovyy-11000101-2f8934ff. Dense, versatile weight with spandex (elastane) that holds its shape for years.
Fitted sheath dresses, bodycon styles, fine turtlenecks: Single jersey 200–220 GSM, 92/8 cotton/spandex (elastane), combed cotton, white — /products/kulirnaya-glad-200-210grm2-465hb485pe5lkr-180sm-kompakt-pene-8acb0e00. Maximum single jersey weight with premium combed cotton yarn; designed for close-fitting premium styles.
Browse the full range in the Single Jersey subcategory. For a broader overview of knit fabric types, see the guide "Knit Fabrics: How to Choose."
Common Mistakes When Choosing Single Jersey GSM
These are the errors that come up most often when sourcing single jersey for production.
Buying 130–140 GSM for a long-sleeve top. Long-sleeve tops sit close to the body and are subject to constant movement. Lightweight single jersey stretches out at the elbows and chest within a season of regular wear. For long-sleeve tops, use 170–190 GSM with spandex (elastane).
Cutting a fitted dress from single jersey with no spandex (elastane). Without spandex (elastane), single jersey stretches but recovers slowly. A fitted dress will begin to bag at the hips after three or four wears. For dresses, use 92–96% cotton with 4–8% spandex (elastane).
Using 130 GSM for white or light-colored t-shirts and dresses. In any direct light, underwear shows through clearly and the finished garment looks unpresentable. For light colorways, use a minimum of 170 GSM — ideally 180–200 GSM.
Sourcing budget open-end cotton (OE) single jersey for a premium collection. Open-end (OE) yarn is inherently fuzzy. After 10–15 wash cycles the fabric pills in high-friction zones (underarms, side seams). For premium garments, use combed cotton as a minimum — compact combed cotton is preferable.
Skipping pre-shrinking before cutting. 100% cotton single jersey can shrink 3–5% on the first hot wash. Cutting straight from the roll without pre-shrinking means the finished t-shirt will drop a full size. Before cutting, always pre-wash the fabric at 40–60°C and allow it to dry fully.
Mismatched fiber content between the body fabric and the rib trims. If the body fabric contains spandex (elastane) and the 1x1 rib knit cuffs and neckband do not, they will shrink at different rates after washing — the trims will ripple and distort. Always source rib trims in a matching fiber content and proportional GSM (for a 170 GSM single jersey body, use 170–200 GSM 1x1 rib knit).
Ordering exactly to the calculated yardage with no cutting allowance. Single jersey must be cut strictly on the grainline. Always add a 5–10% cutting allowance for production runs and 12–15% for individual cut-and-sew work.
Frequently Asked Questions
What is the best single jersey GSM for everyday wear? 160–180 GSM with 4–6% spandex (elastane). Suitable for t-shirts, long-sleeve tops, basic dresses, children's sets from age 3, and school turtlenecks. Fully opaque in all colors and shape-retaining after washing.
What GSM is best for summer t-shirts? 140–160 GSM, 100% cotton, no spandex (elastane). Light and breathable for hot weather. If the garment will be worn year-round rather than just in summer, 160–180 GSM with a light 3% spandex (elastane) addition is the better call.
Which colors show through at lighter GSM weights? White and pastel colors show through noticeably; dark colors barely at all. For white t-shirts, use a minimum of 170 GSM. For dark colorways, 140 GSM performs perfectly well.
What is the best single jersey for babies and young children? 140–160 GSM, 100% cotton, no spandex (elastane), spun from combed or carded cotton yarn. Hypoallergenic, soft, and non-constricting on delicate skin. For school-age children (5–10 years), move up to 170–190 GSM with spandex (elastane) for better durability.
What is the difference between single jersey and jersey? Single jersey ranges from 130–220 GSM and has a smooth, flat structure. Jersey is generally heavier (130–280 GSM) and often denser within an equivalent roll. In practice the boundary is fluid around 200 GSM — the same fabric may be listed as single jersey or jersey depending on the supplier.
Can single jersey be used for a fitted dress? Yes, but only the heavier end of the range: 200–220 GSM with 6–10% spandex (elastane). Lightweight single jersey stretches out of shape over a season of wear. An alternative is jersey at 200–230 GSM with spandex (elastane).
What does OE / carded / combed / compact combed mean on a supplier spec sheet? These refer to the yarn spinning technology. Open-end cotton (OE) is the most affordable — the yarn is slightly rough and the fabric pills after 10–15 washes. Carded cotton is the standard for volume-market production. Combed cotton and compact combed cotton are premium grades. For children's wear and underwear, use combed cotton as a minimum. See the full breakdown in the guide "OE, Carded, Combed, or Compact Combed Cotton."
How much fabric do I need per garment? For an adult t-shirt: 0.9–1.1 m (1–1.2 yd) cut individually, 0.7–0.9 m (0.75–1 yd) in a production run of 10+ units. For a children's t-shirt, ages 5–10: 0.6–0.8 m (0.65–0.9 yd). For a long-sleeve top: 1.1–1.4 m (1.2–1.55 yd) individually, 0.9–1.1 m (1–1.2 yd) in a production run.
What single jersey should I use for a school uniform turtleneck? Single jersey 170–190 GSM, 95/5 cotton/spandex (elastane), carded or combed cotton yarn. Fully opaque, shape-retaining after many wash cycles, paired with fine 1x1 rib knit at the cuffs and neckline.
Can single jersey be machine washed at high temperatures? Not recommended. 100% cotton single jersey can shrink 3–5% when washed above 40°C. Wash at 30–40°C on a delicate cycle, low spin speed. Dry flat or on a hanger — never on a washing line, as the weight of the wet fabric will cause it to stretch out of shape.