Lace yarn is the finest yarn you can get — delicate and almost see-through. It's used for stunning lace shawls and intricate stitch patterns where the design really shines. You get 400 to 600 meters per 50g, so a little goes a long way. It does take patience though: the stitches are tiny and the needles fine (1.5–2.5mm).
Tip: For your first lace project, pick a simple shawl with a repeating pattern — you'll get the hang of it quickly!
Sock yarn is the all-rounder of the fine yarn world. It's tough enough for socks that take a beating, yet fine enough for elegant shawls and lightweight sweaters. With 200–220 meters per 50g, one skein is enough for a pair of socks. Most sock yarns contain a bit of polyamide (nylon) to make them more durable.
Tip: Even if socks aren't your thing — sock yarn makes amazing lightweight summer sweaters!
Sport weight sits right between fine sock yarn and the versatile DK weight. At 160–200 meters per 50g, it's great for lightweight sweaters, baby items, and accessories that aren't too bulky. Think of it as the sweet spot — warmer than sock yarn, but airier than DK.
Tip: Sport weight is perfect for baby clothes — it's light and soft, but still shows off stitch patterns beautifully.
DK is probably the most versatile yarn weight out there. At 120–150 meters per 50g with needle size 3.5–4.5mm, you can knit just about anything: sweaters, cardigans, hats, scarves, and blankets. The fabric is smooth and even, and projects grow at a satisfying pace. If you're unsure what weight to choose, DK is almost always a safe bet.
Tip: DK yarn is also great for crochet — amigurumi come out especially neat and even!
Worsted is the classic weight for cozy winter sweaters and snuggly blankets. At 80–120 meters per 50g on size 4–5mm needles, projects work up nicely and the results are beautifully warm. Cable patterns and textured stitches really pop in this weight.
Tip: If your sweater has cable patterns, worsted weight is the way to go — cables come out bold and defined.
With bulky yarn, your projects grow super fast! At 50–80 meters per 50g, you're working on big needles (5–6.5mm) with large stitches. Perfect for cozy hats, thick scarves, and warm cardigans for chilly days. It's also great for beginners because the big stitches are easy to count and see.
Tip: A hat in bulky yarn is done in one evening — perfect as a quick handmade gift!
Extra thick yarn for anyone who loves fast results! At just 30–50 meters per 50g with needles 7mm and up, you can whip up voluminous scarves, pillows, and home accessories in no time. The fabric is chunky and rustic — exactly right for that cozy hygge look.
Tip: Super bulky is perfect for arm knitting without needles — give it a try!
Jumbo yarn is the thickest there is — some skeins are as thick as your arm! You can knit giant cozy blankets, statement scarves, and decor pieces, often using just your arms instead of needles. A project is done in just a few hours, and the effect is absolutely stunning.
Tip: For an arm-knit blanket you'll need about 3–4 kg of jumbo yarn — plan generously!
Imagine unwinding an entire skein and measuring the yarn — that's the run length. It tells you how much yarn you get per skein. A sock yarn might have over 400 meters per 100g, while a thick winter yarn might only have 80 meters. Together with the weight, run length determines which yarn weight category a yarn falls into.
Tip: When comparing yarns, always convert to the same unit (e.g., meters per 50g) — otherwise you're comparing apples to oranges!
Yarn weight is like a sizing chart for yarn. It tells you how thick the yarn is — from super fine (Lace) to mega thick (Jumbo). Knitting patterns always specify a recommended yarn weight so you know what to buy. The categories are based on run length: the fewer meters per 50g, the thicker the yarn.
Tip: Pay attention to the yarn weight in patterns — a sweater in DK and one in Bulky will look completely different!
Needle size is measured in millimeters and tells you how thick your knitting needles should be. Every yarn has a recommended needle size, but it's really just a starting point! Depending on whether you knit tightly or loosely, you might need half a size up or down. That's exactly why swatching is so important.
Tip: Knit tight? Go up half a needle size. Knit loose? Go down. Your gauge swatch will tell you what's right.
Gauge is your most important tool to make sure your project turns out the right size. You knit a small test swatch (at least 4x4 inches) and count how many stitches and rows fit in that space. If your numbers don't match the pattern, you need a different needle size. It sounds tedious, but it saves you a ton of frustration!
Tip: Always swatch in the same stitch pattern as your project — stockinette and cables have very different gauges!
Fiber composition tells you what your yarn is made of — for example, 100% merino wool or a blend of 75% wool and 25% polyamide. This matters because different fibers behave very differently: wool is warm and springy, cotton is cool with no stretch, and polyamide makes socks last longer.
Tip: Always check the fiber composition when looking for a substitute yarn — similar fibers mean similar knitting behavior!
Animal-free yarns contain no animal fibers whatsoever — no wool, no silk, no alpaca. Instead, you'll find plant fibers like cotton, linen, and bamboo, or synthetics like acrylic and polyester. Perfect if you're vegan or have allergies to animal hair.
Tip: Cotton and linen are wonderful animal-free options for summer projects — they're cooling and super skin-friendly!
Found a knitting pattern you love, but the recommended yarn is discontinued or too expensive? The similarity score shows you which yarns work best as a substitute. It compares fiber composition, gauge, and run length and gives you a score from 0–100%. Above 80% you can usually swap yarns without any issues.
Tip: Look especially for yarns scoring above 90% — they're nearly identical and you won't need to adjust the pattern!
The Craft Yarn Council is the US trade association that established the widely used yarn weight standard system (CYC 0–7). The categories from Lace to Jumbo help you compare yarns across different manufacturers and countries — even when names differ, the CYC number describes the same yarn thickness.
Tip: Check out our yarn weight table to see all CYC categories at a glance!
More on Wikipedia →Arm knitting uses your arms instead of needles — stitches are cast onto one forearm and worked off with your hands. The huge 'needle size' creates super chunky, voluminous knitted fabric in record time. Perfect for blankets, scarves, and home décor. You'll need Super Bulky or Jumbo yarn (CYC 6–7), and for a blanket plan on 3–4 kg of yarn.
Tip: You can also hold multiple strands of regular bulky yarn together if you can't find jumbo yarn!