How to Buy Crochet Yarn Online: Choose Fiber, Weight, and Quantity for Your Project
Buy crochet yarn online by matching three things to your project before you add anything to a cart: fiber content, yarn weight, and total yardage. Fiber decides how the finished piece wears and washes, weight decides how the fabric drapes and how big your stitches look, and yardage decides how many balls you need. At a shop like NuMei, most listings show all three on the product page, so you can compare before ordering. Free shipping applies within the contiguous USA on orders over US$100, which is worth factoring in if you are buying a full project's worth of yarn at once.
Start with fiber: what the yarn is made of
Fiber is the first filter because it rules out yarns that will not survive how the item gets used.
| Fiber type | Best for | Watch out for |
|---|---|---|
| Cotton (e.g. Berlini Cotton Lumi) | Washcloths, market bags, summer tops, amigurumi that needs firm stitch definition | Heavier than wool; little stretch, so hands tire faster on big projects |
| Acrylic and acrylic blends (e.g. YarnArt Jeans) | Blankets, baby items, everyday garments, anything that needs frequent machine washing | Can pill over time; cheaper acrylics may feel squeaky on the hook |
| Wool and wool blends (e.g. Berlini Merino Velvet Worsted) | Winter hats, mittens, sweaters, anything that needs warmth and elasticity | Needs hand washing or careful care; can felt if agitated in hot water |
| Novelty and textured yarns (e.g. YarnArt Fable Fur) | Trim, toys, accents, quick statement pieces | Hard to see stitches in, so not ideal for learning new stitch patterns |
If the item will be washed often, lean acrylic or cotton. If it needs to hold shape and warmth, lean wool. If it is a toy or bag that gets dragged around, cotton's firmness usually beats wool's softness.
Match yarn weight to your hook and project
Yarn weight is the single biggest predictor of how your project turns out. The label weight category (sport, DK, worsted, bulky) matters more than the brand.
- Fine weights (sport, fingering): small hooks, dense fabric, slow to work up. Good for amigurumi, socks, and detailed garments.
- DK and light worsted: the most versatile middle ground. Works for garments, blankets, and hats without becoming stiff.
- Worsted and aran: the default for blankets, scarves, and beginner projects because stitches are easy to see and the fabric works up quickly.
- Bulky and super bulky: fast projects like chunky blankets and cowls, but yardage per ball is lower relative to the size of the finished piece.
A practical check: the hook size printed on the yarn label is a starting point, not a rule. Crochet typically uses a hook one to two sizes larger than the recommended knitting needle for the same yarn, because crochet stitches are denser. Swatch a small square first — if the fabric feels like cardboard, go up a hook size; if it feels loose and holey, go down.
Estimate quantity before you order
Running out mid-project is the most common online yarn-buying mistake, because dye lots rarely match perfectly between orders.
- Find the pattern's stated yardage (not just "5 balls") for your size.
- Check the yardage per ball on the product listing — this is where two yarns of the same weight can differ a lot.
- Divide total yardage needed by yardage per ball, then round up.
- Add one extra ball for anything larger than a scarf, especially if the yarn is on sale or may be discontinued.
Bag pricing changes the math. On NuMei, several yarns are sold both as single balls and as bags of 5 or 10 at a lower per-ball price — for example, Berlini Cotton Lumi is listed at $3.79 for a 50g ball and $29.90 for a bag of 10, and Tropical Lane Pregiata shows $3.99 per ball versus a discounted bag price. If your project needs 8 balls, buying a bag of 10 is often cheaper than 8 singles and gives you spare yarn for gauge mistakes.
Read the product page like a checklist
Before checkout, confirm these fields on each listing:
- Weight and yardage per ball — needed for the quantity math above.
- Fiber composition — determines care instructions.
- Ball size in grams — a 100g ball is not automatically twice the yardage of a 50g ball; check the length.
- Stock status — listings on NuMei show "in stock" with a quantity field, so you can see whether the amount you need is actually available.
- Color name and number — record the exact shade code so a reorder matches.
Cost and shipping considerations
NuMei positions its yarn as wholesale/discount pricing, and the site runs a Sale / Specials section alongside coupons and gift certificates. Two things affect your real cost:
- Free shipping threshold: orders over US$100 ship free within the contiguous USA. If you are close to that number, adding a ball or two of a yarn you will use again is often cheaper than paying shipping.
- Bag versus single pricing: the per-ball savings on bags of 5 or 10 can be significant, but only buy a bag if you will genuinely use the extra yarn or can absorb the cost of leftovers.
A quick decision path
- Decide how the finished item will be washed and worn → pick fiber.
- Match yarn weight to the pattern's recommended weight → pick the weight category.
- Multiply pattern yardage by your size, divide by yardage per ball, round up → pick the quantity.
- Compare single-ball and bag pricing, and check whether your total crosses the free-shipping threshold → place the order.
If you are buying for a first project, worsted-weight acrylic or cotton in a light color is the safest combination: easy to see, easy to wash, and forgiving of uneven tension.