What yarn is recommended to use with the 5 mm (H-8) crochet hook?

It is recommended that "Weight 2 - Fine" and "Weight 3 - Light" yarn weights are used with the 5 mm (H-8) crochet hook size.

What is the comparable UK size of a H-8 crochet hook?

The United Kingdom size of 6 is the same as the US crochet hook size of H-8.

The metric size of 5 mm is the same as the US crochet hook size of H-8.

The US size of H-8 is the same as the metric crochet hook size of 5 mm.

US Name:	H-8
UK Name:	6
Metric Name:	5 mm
Yarn Weight:	This crochet hook size works well when paired with the following yarn weight(s). Fine Weight #2: Sport and Baby Light Weight #3: DK or Light Worsted

These free crochet patterns were all created using various yarn types and brands, but all use the 5 mm (H-8) sized crochet hook.