Views: 0 Author: Site Editor Publish Time: 2026-11-05 Origin: Site
Two quotations arrive for "a custom cotton tote". One says 10oz canvas, the other says 280gsm cotton. They look like the same bag and they are priced differently — and the buyer usually assumes the gap is margin. It is not. It is the cloth.
GSM is grams per square metre: the weight of one square metre of fabric. Ounces (oz) describe the same thing in imperial units, measured per square yard. Because 1 oz/yd² is roughly 33.9 gsm, the two systems convert cleanly — but only if both suppliers are quoting the same thing. Some quote the finished bag weight, some quote the greige cloth before finishing, and a few quote a nominal weight they do not actually stock.
Nominal weight | Approximate GSM | What it usually becomes |
|---|---|---|
4 oz | 135 gsm | Event giveaway, single-use promo, light calico |
6 oz | 200 gsm | Counter bag, low-cost retail, conference tote |
8 oz | 270 gsm | Standard retail tote, the most common specification |
10 oz | 340 gsm | Branded retail, reuse-heavy, holds its shape |
12 oz | 400 gsm | Premium merchandise, structured bags, embroidery base |
14 oz | 475 gsm | Tool bags, garden bags, heavy-duty workwear crossovers |
The number to write into your specification is the cloth weight in GSM, not the ounce figure. Ask the supplier to confirm it in writing and to state whether it is measured before or after finishing.
Weight should follow use, not aesthetics. A bag that is too light fails at the handle seam within weeks; a bag that is too heavy costs money you cannot recover at retail.
4–6 oz (135–200 gsm): short-life giveaways, trade show totes, single-season promotions. Cheap, prints crisply, creases easily and will not survive repeated loads.
8 oz (270 gsm): the default for retail counter bags and light grocery. Handles a laptop, a lunch, a few books. This is where most custom programmes land.
10 oz (340 gsm): the practical ceiling for a bag a customer is expected to reuse weekly. Holds shape when empty, resists the handle pulling through, prints and embroiders well.
12–14 oz (400–475 gsm): premium merchandise and utility bags. Justified when the bag is a paid product rather than a giveaway, or when the load is genuinely heavy.
Weight is the headline number, but four other variables decide whether the bag feels substantial in the hand.
Yarn count and pick count. A tighter weave with finer yarn can feel firmer than a heavier, looser cloth. Ask for the pick count if the feel matters.
Canvas versus duck. Both are plain-woven cotton; duck is woven with a heavier, more tightly twisted yarn in a double-fill construction, which is why it feels stiffer and resists abrasion better.
Finishing. Calendered cloth is pressed flat and looks smoother; washed cloth is softer and slightly duller. The same base cloth can leave the factory looking like two different products.
Shade and lot variation. Natural and ecru cotton varies between dye lots. If your brand colour is critical, specify a Pantone reference and agree an acceptable tolerance before production, not after.
Almost every returned cotton bag fails at the handle attachment. The body outlives it. Three constructions cover most orders:
Self-fabric handles. Cut from the same cloth, folded and stitched. Cheapest, visually seamless, and the first to stretch under load because the cloth has no independent tensile strength.
Webbing or tape handles. Woven polypropylene or cotton tape. Stronger, available in a contrast colour, and the usual choice once the bag carries more than about 5 kg.
Reinforced attachment. The handle should be caught into the bag with a box-X stitch through a doubled seam allowance. This single detail separates a bag that lasts two years from one that lasts two months, and it costs very little.
Handle drop length follows the carrying position: around 25 cm for a hand-carried counter bag, 35 cm for a shoulder bag, and 60 cm or more for crossbody. Specify the drop, not the total handle length — suppliers interpret the two differently.
Method | Best for | Limits on cotton canvas |
|---|---|---|
Screen printing | 1–3 spot colours, bold logos, heavy ink deposit | Each colour adds a screen and a setup cost; photographic images are impractical |
Heat transfer | Full-colour artwork, gradients, small runs | Hand feel is firmer; adhesion on a textured canvas is weaker than on a smooth polyester |
Embroidery | Logos on 10 oz and above, premium positioning | Priced per stitch; fine detail and small text fall apart on coarse cloth |
Digital direct | Many colours, short runs, samples | Softer hand, limited penetration on heavy canvas, higher per-unit cost at volume |
The practical rule: the more colours and the finer the detail, the further you move from screen printing — and the more the unit price is set by the decoration rather than the bag.
Untreated cotton moves. Expect roughly 3–5% shrinkage on the first wash for an unwashed cotton bag, and specify pre-shrunk or washed cloth where dimensional accuracy matters. Reactive-dyed cloth generally holds colour better through washing than pigment-dyed cloth, which sits on the surface and fades at the edges first.
Before a production run, wash three pieces three times and check four things: the handle attachment seam, the edge of the print, the base colour, and the overall dimensions. This takes a day and prevents the most common bulk complaint.
Field | What to write |
|---|---|
Material and weight | Cotton canvas, 10 oz / 340 gsm, natural or Pantone-matched |
Size | Width × Height × Depth in cm, finished dimensions |
Handle | Self-fabric or webbing, drop length in cm, attachment stitch |
Decoration | Method, number of colours, print area in cm, artwork file format |
Reinforcement | Box-X stitch at handle ends, doubled seam allowance |
Packing | Units per polybag, units per carton, carton dimensions and weight |
Quantity | Order quantity plus any repeat-order assumption |
Delivery | Incoterm, destination port or door, in-hand date |
Quotations built on this template are comparable. Quotations built on "a custom tote bag, 5,000 pcs" are not — and the difference usually surfaces at inspection.
Is 10 oz canvas heavy enough for a grocery tote? Yes. 10 oz / 340 gsm with webbing handles and box-X reinforcement carries a weekly grocery load comfortably. 8 oz is adequate for lighter retail use; 12 oz is only justified if the bag is sold as a product in its own right.
What is the difference between canvas and calico? Calico is a lighter, plainer cotton weave, often unbleached, typically 4–6 oz. Canvas is heavier and denser. A calico tote and a 10 oz canvas tote are not substitutes, even when both are described as "cotton".
Can you print full colour on canvas? Yes, by heat transfer or digital direct printing. On a textured canvas the hand feel is firmer than on a smooth fabric, and adhesion is the variable to test. For logos in one to three colours, screen printing remains the most durable and usually the cheapest at volume.
How long does a custom cotton bag order take? Sampling runs about 7 days from approved artwork, excluding courier time. A 5,000-piece run takes about 30–37 days once material is in hand, colour is frozen and the pre-production sample is signed off. Four weeks is achievable only when the material is already in stock, the artwork is final, no new sample is required and freight space is booked in advance.
Send artwork, finished size, cloth weight, handle type, quantity and your in-hand date. We quote after the artwork is approved, not before, because most of the variables that move the price are decided at that point.
