US 0 Knitting Needle: Metric & UK Size

Metric rulers put a US size 0 knitting needle at 2.0mm; on a vintage British pattern the identical needle is stamped UK/Canada (old) size 14 — one of the finer needles in regular production, well below the range most general-purpose patterns call for.

What it's typically used for

US 0 sits right at the boundary between lace weight (recommended US 000-1) and fingering weight (recommended US 1-3), which makes it a common choice for a firm, dense fingering-weight fabric or a looser lace-weight one. It shows up most often in fine sock knitting (for a tight, durable heel and toe fabric), doll and miniature garment patterns, and lace shawls where a firmer gauge than the yarn's "standard" range is wanted for structure.

Its place in the wider table

One step down sits US 00 (1.75mm, with no published UK old number); one step up sits US 1 (2.25mm, UK 13). UK 14 is close to the top of the UK old scale, consistent with the inverse relationship covered on the Needle & Hook Size Converter: the finer the physical needle, the higher the UK number climbs.

Gauge implications

Reaching for US 0 instead of a more typical fingering-weight needle (US 1-3) generally tightens the fabric well past what the yarn's own published gauge range predicts — useful when durability or firmness is the goal, less useful when the design wants the yarn's natural drape. Always swatch against your specific pattern's stated numbers rather than assuming "fine needle, fine result" lines up with what the designer intended.

FAQ

Is a US 0 needle unusually thin to knit with? It's on the finer end of what's commonly stocked, but well within normal range for anyone who's worked fingering or sock-weight patterns before — the technique doesn't change, just the visible stitch size and the pace of progress.

What yarn weight pairs best with a US 0 needle? Most commonly lace or fine fingering weight, worked at a slightly denser-than-standard gauge; check the fingering weight guide and lace weight guide for their own full standard ranges.

Do straight, circular, and double-pointed US 0 needles all knit the same fabric? Yes — needle format changes how you hold the work, not the stitch size, so a straight, circular, or double-pointed US 0 all produce an identical gauge in the same hands.