How to use a crochet hook ruler?

A crochet hook ruler (also known as a needle gauge) is used to determine the size of your crochet hook. Here's how to use one:

1. Identify the Holes: A crochet hook ruler has multiple holes of varying sizes, each marked with a size designation (both US and metric).

2. Insert Your Hook: Insert your crochet hook into the holes until you find the one that fits snugly but smoothly.

3. Read the Size: The marking next to that hole indicates the size of your hook. According to the reference, "you would just look at the markings on the hole that your hook fit into." For example, it might say "15" which is the US measurement, and "10 millimeter," which is the metric size.

Step	Description
1. Find the holes	Locate the various sized holes on the ruler
2. Insert Hook	Put the crochet hook into the holes, one at a time.
3. Snug and Smooth	Ensure the hook fits snugly but smoothly in the hole without forcing it.
4. Identify the Size	Read the US and metric sizes marked adjacent to the hole that fits.