Muslin vs Canvas vs Calico: Cotton Bag Fabrics and GSM Explained
Muslin, canvas, and calico are all cotton fabrics, and the main difference between them is weight, measured in GSM (grams per square meter). Muslin is the lightest and softest, canvas is the heaviest and most durable, and calico sits in between as an economical, natural-looking cotton.
The right fabric depends on how much weight the bag must carry and the look you want. This guide compares all three, explains GSM, and helps you match the material to your product.
Cotton bag fabric comparison
| Fabric | Typical weight | Feel | Best for |
|---|---|---|---|
| Muslin | ~60-90 GSM | Light, soft, breathable | Favors, herbs, jewelry, samples |
| Calico | Varies (light to medium) | Natural, unbleached, sturdy | Promotions, everyday packaging |
| Standard cotton | ~135-200 GSM | Medium weight | Gifts, retail, general use |
| Canvas | ~270 GSM and up | Heavy, dense, structured | Heavier contents, tools, premium retail |
What is GSM and why it matters
GSM (grams per square meter) measures fabric weight and is the clearest indicator of a cotton bag's durability. As a guide, 1 ounce per square yard equals about 33.9 GSM, so 5 oz cotton is roughly 170 GSM and 8 oz canvas is around 270 GSM. Higher GSM means a thicker, stronger, longer-lasting bag, but also more material cost.
Which cotton fabric should you choose?
- Choose muslin for lightweight items and a soft, breathable feel, such as favors, herbs, and jewelry.
- Choose calico for economical, large-run promotional bags with a natural look.
- Choose standard cotton for everyday packaging, gifts, and general retail use.
- Choose canvas for heavier contents, durability, and a premium feel.
BAGSGeek drawstring bags use natural 145 GSM woven cotton, a mid-weight balance of durability, breathability, and clean print quality. For heavier needs, see our canvas double drawstring bags, or browse the full range of cotton bags.
Frequently asked questions
Is muslin the same as cotton?
Muslin is a type of cotton fabric. It is a lightweight, loosely woven cotton, so all muslin is cotton, but not all cotton is muslin. Standard cotton and canvas are woven more tightly and are heavier than muslin.
What is the difference between calico and muslin?
Calico is a heavier, unbleached cotton with a natural off-white color and small flecks, while muslin is lighter and smoother. Calico is popular for economical promotional bags; muslin is preferred for lightweight favors and delicate items.
What GSM is best for a reusable bag?
For reusable everyday bags, around 140 to 200 GSM offers a good balance of durability and cost. Lighter muslin (60 to 90 GSM) suits small, light items, while canvas (270 GSM and up) is best for heavy or frequent use.
Which fabric is best for custom printing?
Standard cotton and canvas both take custom printing well because their tighter weave gives a smooth, stable surface. Muslin can be printed too, though its lighter weave suits simpler designs and smaller bags.
Ready to order? Explore single drawstring, double drawstring, and canvas cotton bags, or get a bulk quote on the Custom Order page.