Hat quantities

How much wool to knit a hat?

The baby hats in this three-design sample allocate 105 m: one 100 g ball of Special DK by length. The adult pompom hat allocates 210–315 m, or one to two balls. Measure the head and follow the chosen design’s tension; an age label alone does not choose the fit.

HazelLoop planning guide · Updated 12 October 2026 · Figures from cited sources

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How many balls of wool by head size?

These figures are three patterns’ material lists, converted from Merino Extra Fine’s 105 m per 50 g. We show centimetres and the source’s age or adult size label. This is not a population head-size chart.

Special DK, Simply DK and Bambino DK hold 295, 276 and 268 m in 100 g acrylic balls. The one-ball baby figures leave plenty over by length. That is different from saying the pattern uses 100 g.

Three knitted DK hat purchase lists. Head measurements and age labels belong to the individual sources; comparison balls all 100 g.
Design	Source size	Head (cm)	Length	Special DK	Simply DK	Bambino DK
Roll On	1–3 months	40–42	105 m	1	1	1
Roll On	6–9 months	44–46	105 m	1	1	1
Roll On	12–18 months	46–48	105 m	1	1	1
Roll On	2 years	48–50	210 m	1	1	1
Roll On	3–4 years	50–52	210 m	1	1	1
Pearly Cheeks	1–3 months	40–42	105 m	1	1	1
Pearly Cheeks	6–9 months	44–46	105 m	1	1	1
Pearly Cheeks	12–18 months	46–48	105 m	1	1	1
Pearly Cheeks	2 years	48–50	210 m	1	1	1
Pearly Cheeks	3–4 years	50–52	210 m	1	1	1
Limingen	Adult S/M	54–56	210 m	1	1	1
Limingen	Adult M/L	56–58	315 m	2	2	2

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Baby hats: stocking stitch and moss stitch

Roll On gives 105 m for each of its 1–3, 6–9 and 12–18 month sizes, then 210 m for 2 and 3–4 years. The finished heights are 16–20 cm across the five sizes. Pearly Cheeks uses the same stated quantities but has moss stitch and a ribbed edge.

Equal rounded purchase lists do not prove equal measured use. A deeper turn-up, extra height or a different texture can change what is left in the ball. Keep an age label separate from the actual head measurement.

An adult hat and pompom

Limingen fits about 54–56 or 56–58 cm heads and allocates 100 or 150 g of original wool: 210 or 315 m. The upper figure exceeds a 295 m Special DK ball, so its one-colour shopping list rounds to two balls.

The design includes a pompom. Check whether your own source quantity already covers its finishing before adding an extra allowance. For a contrast pompom, keep that colour separate rather than borrowing all its metres from the main shade.

Needles and tension are pattern-specific

Roll On uses 4 mm needles and lists 21 stitches × 28 rows in stocking stitch. Pearly Cheeks lists its check in moss stitch, with 3.5 mm rib needles and 4 mm for the main work. Limingen uses 3 mm rib needles and 3.5 mm for 22 stitches × 30 rows in stocking stitch.

Changing needle size changes the fit as well as the fabric. Match the pattern’s check in the named stitch; a general yarn band cannot predict a ribbed hat’s stretch.

Where the amounts come from

Three published knitting patterns from one manufacturer were checked on 12 October 2026. Their original gram allocations are converted using 105 m/50 g, then rounded up by each comparison ball’s actual length. We have not knitted or weighed these hats.

These knitting quantities stay separate from the crochet hat/beanie guide. They are different designs, so they do not establish a universal knitting-versus-crochet percentage.

Try it with your own numbers.

Calculate whole balls or packs for every colour. Subtract your stash and add UK delivery.

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Sources and scope

Sources checked 12 October 2026. Label facts come from the linked references; worked purchase examples and arithmetic are our own illustrations. Original pattern and product names retain their source spelling.

How much yarn do I need? All UK wool quantity guides

Keep planning

These are planning estimates, not claims of projects we have made. Read our method and editorial approach.