How to Knit an Icelandic Lopapeysa: A Beginner's Guide

The lopapeysa is Iceland's iconic wool sweater — instantly recognisable by its circular yoke of geometric colourwork around the shoulders. It's knitted in the round from Icelandic lopi wool, and despite its striking look it's a surprisingly approachable project, even for a first sweater. This guide walks you through what a lopapeysa is, what you'll need, and how it comes together.

What is a lopapeysa?

“Lopapeysa” simply means “lopi sweater” in Icelandic (lopi = Icelandic wool, peysa = sweater). The defining feature is the yoke: a band of patterned colourwork that radiates from the neckline over the shoulders. The garment is knitted seamlessly in the round, which is part of what makes it warm, durable and quick to wear in.

Although it feels timeless, the lopapeysa is relatively modern — it emerged in the mid-20th century — and it has become a national symbol. An authentic Icelandic lopapeysa, hand-knitted in Iceland from new Icelandic wool, even meets the criteria for a protected designation by the Icelandic Food and Veterinary Authority.

What you need to knit a lopapeysa

• Yarn: The classic choice is Léttlopi (aran/worsted weight). You'll need a main colour plus 2–3 contrast colours for the yoke. For a lighter sweater, knitters use Plötulopi; for a heavier, faster one, Álafoss Lopi. See our yarn guide to choose.
• Needles: A circular needle (typically 4.5–5 mm for Léttlopi) plus a shorter circular or double-pointed needles for the sleeves.
• A pattern: Browse Ístex knitting patterns or start with one of our free patterns.
• Notions: stitch markers, a tapestry needle, and scissors.

The simplest way to get everything at once is a knitting kit — each one bundles the exact yarn, quantity and pattern for a specific design, so there's no guesswork.

How a lopapeysa is knitted, step by step

1. Body: Cast on at the hem and knit the body in the round up to the underarms in your main colour.
2. Sleeves: Knit two sleeves in the round from the cuff up to the underarms.
3. Join: Combine the body and sleeves onto one long circular needle, setting a few underarm stitches aside on each.
4. Yoke: This is the star of the show. Following the chart, knit the colourwork yoke, decreasing at set rounds so the yoke shapes gently toward the neck.
5. Neck & finishing: Finish the neckline, graft the underarms closed, and weave in ends. Wash and block, and your lopapeysa is done.

Tip for beginners: knitting from the bottom up means you knit the (easy) body and sleeves first and reach the colourwork yoke only once you're comfortable with the yarn.

Getting the size right

Lopi sweaters are designed with a little positive ease for layering. Measure a sweater you already love and compare it to the pattern's finished measurements. Our sizing guide walks through exactly how to measure.

Prefer not to knit it yourself?

Every sweater we sell is hand-knitted in Iceland from 100% Icelandic wool — many by Icelandic women who knit as a lifelong craft. Browse ready-made Icelandic sweaters & cardigans, or order a custom size at no extra cost. Everything ships worldwide from Iceland.

Frequently asked questions

Is a lopapeysa good for beginner knitters?

Yes. Because it's knitted in the round with no seams and the colourwork uses only two colours per round, a lopapeysa is a popular “first sweater.” A kit with a clear pattern makes it very manageable.

How much yarn do I need for a lopapeysa?

A typical adult Léttlopi sweater takes roughly 400–500 g of main colour plus a ball or two of each contrast colour, depending on size. Our knitting kits include the exact amount for the design and size.

What yarn is used for a traditional lopapeysa?

Léttlopi is the traditional, most popular choice. Plötulopi (unspun) makes a lighter sweater and Álafoss Lopi a heavier, quicker one — all are 100% Icelandic wool from Ístex.

How long does it take to knit a lopapeysa?

An experienced knitter might finish in 20–40 hours of knitting; a beginner should allow more time and enjoy the process. The seamless construction means very little finishing at the end.

What makes a lopapeysa “authentic”?

An authentic Icelandic lopapeysa is hand-knitted in Iceland from new Icelandic wool. That combination is what qualifies it for protected-designation status under the Icelandic Food and Veterinary Authority.