What size crochet hook or knitting needle for what ply yarn?

Please note, this table has been created as a guide, always refer to the pattern or yarn in question. We would also recommend testing gauge and tension with a tension swatch. 

Laceweight (1 ply)

• Designed for use in advanced patterns only, this can be used to make lace garments and accessories.
• 1.5 – 2.25mm knitting needles
• 0.75 – 3mm crochet hook

Fingering (2 ply)

• Also for use in advanced patterns only, this can be used to make lace garments and accessories.
• 1.25 – 3.5mm knitting needles
• 2 – 3.5mm crochet hook

Sport (5 ply)

• Tricky to use, this is commonly reserved for use in complex, decorative accessories.
• 3.5 – 4.5mm knitting needles
• 2 – 3.5mm crochet hook

DK (8 ply)

• Used to create warm garments, including hats, jumpers and cardigans.
• 4.5 – 5.5mm knitting needles
• 3.5 – 4.5mm crochet hook

Aran (10 ply)

• Creates snug winter clothing and accessories, such as hats, scarves and jumpers.
• 5.5 – 6.5mm knitting needles
• 5 – 6.5mm crochet hook

Chunky (12 ply)

• Great for chunky mid-winter jumpers and cardigans designed to keep out the cold.
• 6.5 – 9mm knitting needles
• 6.5 – 9mm crochet hook

Super chunky (14 ply)

• Ideal for creating heavyweight rugs or blankets.
• 9mm + knitting needles
• 9 - 14mm crochet hook