International yarn weight conversion

Different terminology is used in different countries, and it is often difficult to work out which yarn weight should be used for a non-native pattern. (source: Wikipedia)

USA UK Australia Suggested needle (mm)
Laceweight 1 ply 2 ply 1.5–2.25 mm
Fingering 2 ply 3 ply 2.25– 3 mm
Sock 3 ply 3 ply 2.25— 3.25 mm
Sport 4 ply 5 ply 3.25— 3.75 mm
DK/Light Worsted DK 8 ply 3.75— 4.5 mm
Worsted Aran 10 ply 4.5— 5.5 mm
Bulky Chunky 12 ply 5.5– 8 mm
Super Bulky Super Chunky 14 ply 8 mm and up


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