Muslin Bags: The Complete Buyer's Guide (Sizes, Uses & Bulk)

A muslin bag is a lightweight, loosely woven 100% cotton drawstring bag. The open weave is the whole point: it lets air and aroma through, which is why muslin is used for tea, herbs, spices, favours and straining, and why it is the wrong choice for anything that needs to be sealed or hidden.

What muslin actually is

Muslin is a plain-weave cotton, woven more openly and at a lighter weight than standard cotton or canvas. Hold it to the light and you can see through it slightly — that is not a defect, it is the specification.

Three related fabrics get confused constantly:

• Muslin — lightest, most open weave. Breathable, soft, slightly translucent, cheapest per bag.
• Standard cotton (145 GSM) — denser and opaque. Hides contents, holds a crisper print.
• Canvas — heaviest and tightest. Structured, holds its shape, carries weight.

All three are the same fibre. If you need the contents concealed, or a very fine print, muslin is not the right pick — see muslin vs canvas vs calico for the full comparison.

Muslin bag sizes and what fits

Sizing rule: measure the item at its widest point, add about half an inch either side, then add an inch and a half of height so the cord closes without straining the seam.

What muslin is genuinely good at

• Tea, herbs and spices — aroma passes through the weave; the bag can brew directly in the cup.
• Straining — nut milk, cold brew, stocks and jellies. Muslin holds its shape where loose cheesecloth collapses.
• Favours and small gifts — the informal, natural look reads as handmade rather than mass-produced.
• Soap and bath products — a cured bar keeps drying instead of sweating, and the bag doubles as a soap saver.
• Seed saving and drying — airflow keeps seed viable and stops herbs going mouldy.
• Jewellery — soft cotton will not scratch metal or stones.

And what it is not good at

Muslin is breathable, which means it is not a barrier. It will not keep moisture, oxygen or odour out, so it is wrong for anything requiring a seal — ground coffee you want to stay gassed, anything with a shelf life driven by oxidation, or powders fine enough to sift through the weave. In those cases a muslin outer over a sealed inner gives you the look without the compromise.

It is also the wrong choice when contents must be hidden, because it is slightly translucent, and when artwork has very fine detail, because ink spreads into an open weave.

Food safety and care

Natural unbleached cotton muslin has long been used for tea, coffee, spices and bread. If you are packaging food, ask any supplier, including us, for documentation on the fabric and any certification they claim, rather than accepting a general statement that the fabric is natural.

Wash before first use if the bag will touch food. Machine wash cold on a gentle cycle, or hand wash, and air dry. Expect a small amount of shrinkage on the first wash — that is normal for unbleached cotton and worth allowing for if the fit is tight. Full routine in how to wash and care for cotton muslin bags.

Buying muslin bags in bulk

Blank muslin comes in packs of 100, 500 and 1,000, and it is the cheapest cotton bag per unit. Custom printing starts at 100 pieces, set by the screen setup rather than the bags, with meaningful price steps at 500, 1,000 and 5,000.

Because muslin is light, freight stays low even on large orders — one of the reasons it scales better than canvas for high-volume packaging. Browse cotton muslin bags, or see wholesale muslin bag pricing for how the ladder works. For branded runs, custom drawstring bags with your logo are printed in the same factory that weaves them.

Frequently asked questions