What yarn is recommended to use with the 10 mm (N/P-15) crochet hook?

It is recommended that "Weight 5 - Bulky" and "Weight 6 - Super Bulky" yarn weights are used with the 10 mm (N/P-15) crochet hook size.

What is the metric equivalent of a N/P-15 crochet hook?

The metric size of 10 mm is the same as the US crochet hook size of N/P-15.

The US size of N/P-15 is the same as the metric crochet hook size of 10 mm.

US Name:	N/P-15
UK Name:
Metric Name:	10 mm
Yarn Weight:	This crochet hook size works well when paired with the following yarn weight(s). Bulky Weight #5: Chunky, Craft or Rug Super Bulky Weight #6: Super Bulky or Roving

These free crochet patterns were all created using various yarn types and brands, but all use the 10 mm (N/P-15) sized crochet hook.