US Size 19 Knitting Needles (15 mm): Yarn Weight, Gauge and Conversions
A US size 19 knitting needle is 15 mm in diameter. It suits jumbo yarn, which knits at 6 or fewer stitches per 4 inches. At up to 6 stitches per 4 inches, a 20 inch hat needs up to 32 stitches and an 8 inch scarf up to 12.
Knitting needle size is the diameter of the shaft, measured in millimeters. This needle is 15 mm, about 0.59 inch across. US size 19 is the American label for a 15 mm needle. The millimeter figure is the one that matches across every brand, so it is printed on most needles and needle gauges.
What is a US 19 knitting needle in mm and old UK sizes?
| Metric | 15 mm |
|---|---|
| Inches (diameter) | 0.59 in |
| US size | 19 |
| Old UK and Canadian size | None |
| Crochet hook, same diameter | P/Q (15 mm) |
| Usual yarn weight | jumbo |
| Estimated gauge | up to 6 stitches per 4 in |
Some charts also list the sizes below. They are close enough to 15 mm that they share this page.
| Metric | US | Old UK | Note |
|---|---|---|---|
| 19 mm | 35 | None | Listed on conversion charts. |
| 25 mm | 50 | None | Listed on conversion charts. |
| 35 mm | 70 | None | Listed on conversion charts. |
What yarn weight goes with US 19 needles?
The Craft Yarn Council lists 15 mm inside the recommended needle range for the yarn weights below. The hat and scarf columns show how many stitches the full gauge range of each weight gives, so you can see how much the yarn choice moves the numbers.
| Yarn weight | CYC needle range | Gauge per 4 in | 20 in hat | 8 in scarf |
|---|---|---|---|---|
| Jumbo | 12.75 mm (US 17) and larger | 6 or fewer | up to 32 | up to 12 |
How many stitches do you cast on with US 19 needles?
The estimated gauge places 15 mm within the CYC range for jumbo yarn: the smallest recommended needle gets the most stitches per 4 inches and the largest gets the fewest. That gives up to 6 stitches per 4 inches on this needle. Circular pieces are rounded to a multiple of 4 so 2x2 ribbing works out.
| Piece | Width or circumference | Cast on (estimate) |
|---|---|---|
| Hat, 20 in around (multiple of 4) | 20 in | up to 32 |
| Snug hat, 18 in around | 18 in | up to 28 |
| Cowl, 24 in around | 24 in | up to 36 |
| Scarf, 8 in wide | 8 in | up to 12 |
| Baby blanket, 42 in wide | 42 in | up to 63 |
| Throw, 50 in wide | 50 in | up to 75 |
Swatch before you trust any cast-on number
Knit a swatch at least 6 inches wide, wash and dry it the way you will treat the finished piece, then count stitches across the center 4 inches. Put your real number into the cast-on calculator for an exact count.
Needles and supplies for US 19 (15 mm)
Bernat Blanket Super Bulky Chenille Yarn, 3 pack
$21.81Three 150 g, 108 yard balls of 100 percent polyester super bulky yarn made for blankets.
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Authentic Knitting Board 38 inch Adjustable Blanket Loom
$69.99A 38 inch solid hardwood loom with 170 pegs, 84 of them double, for wide panels such as blankets.
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KnitIQ Blocking Mats, 9 piece set with T-pins
$54.99Nine 0.75 inch thick mats with 100 T-pins and a storage bag for blocking finished pieces.
Check pricePrices change often, so confirm on Amazon. As an Amazon Associate we earn from qualifying purchases.
What crochet hook matches a US 19 knitting needle?
The P/Q crochet hook is also 15 mm. Diameter is where the match ends, though: crochet fabric is denser, so CYC pairs jumbo yarn with 12.75 mm (US 17) and larger needles but larger hooks. A 15 mm hook usually suits a lighter yarn than a 15 mm needle does.
What are the knitting needle sizes next to US 19?
Frequently asked questions
What size is a US 19 knitting needle in mm?
A US size 19 needle is 15 mm in diameter, about 0.59 inch. There is no old UK number for it on common conversion charts. Charts also list 19 mm (US 35), 25 mm (US 50) and 35 mm (US 70), covered on this page. US numbers were never fully standardized, so trust the millimeter size printed on the needle or check it in a needle gauge. The nearest size on the chart is US 17 (12.75 mm).
What yarn weight do you use with US size 19 needles?
CYC places 15 mm inside the recommended needle range for jumbo yarn. Jumbo is the usual match: its range is 12.75 mm (US 17) and larger, knitting at 6 or fewer stitches per 4 inches. The size sits inside a single category, so it is a straightforward match. Your pattern gauge matters more than the category name.
How many stitches do I cast on for a hat with US 19 needles?
At up to 6 stitches per 4 inches, our estimate for jumbo yarn on 15 mm needles, a 20 inch hat needs up to 32 stitches, rounded to a multiple of 4 for ribbing. For a snug fit many patterns size the hat 1 to 2 inches smaller than the head, which is about 28 stitches at 18 inches. The estimate places the needle within the CYC gauge range, so knit a swatch and recount before you cast on.
How many stitches for a scarf on US 19 needles?
Cast on up to 12 stitches for an 8 inch wide scarf at 6 stitches per 4 inches. A 6 inch scarf needs about 9 and a 10 inch scarf about 15. Stitch pattern changes both width and yarn: garter stitch used about 46 percent more yarn than stockinette in one test. A quick 4 inch swatch in the stitch you plan to use gives a better count than the label gauge.
What crochet hook is the same size as a US 19 knitting needle?
The P/Q crochet hook is also 15 mm, so the two share a diameter. They are not interchangeable for the same yarn, though. CYC pairs jumbo yarn with 12.75 mm (US 17) and larger needles but 15 mm (Q) and larger hooks, because crochet fabric is denser. A 15 mm hook usually suits a lighter yarn than a 15 mm needle does.
Are US size 19 needles good for beginners?
They can be, for quick projects. At 15 mm a throw can be as few as 75 stitches across, so finished pieces appear fast and stitches are easy to see. The trade-offs are heavy yarn, large loops that loosen easily and less forgiving tension, so start with a cowl or scarf before a blanket.
How we research: we compare manufacturer specifications, owner manuals, published standards and recurring themes in verified owner reviews. We do not test products in person, and this is researched guidance, not professional advice. Follow your machine manual and pattern, and take care with rotary cutters, hot irons and needles. As an Amazon Associate we earn from qualifying purchases.