A size "C" crochet is generally around 2.75 mm in the United States.
There isn't really any specific standards regarding crochet hook sizes, different manufacturers made their hooks in different sizes, and that pretty much still is happening today.
A 9 mm crochet hook is read as being: nine milli meters, or approximately 0.35 inches (a smidge more than one-third of an inch). This would be a size N hook.
A 9mm hook would correspond to size 13 knitting needle.
A 3mm crochet hook is halfway between a C and D size in US sizes.
Millimeters, it is the size of the bullet.
Dimensions: 6.7"/170 mm wide x 2.9"/74 mm high x .9"/23 mm deep
Here you go: 1) Slip Stitch 2) Single Crochet 3) Half Double Crochet 4) Double Crochet 5) Treble Crochet 6) Single crochet increase 7) Single Crochet decrease 8) Double Crochet increase 9) Double crochet decrease 10) Treble Crochet increase
The 9 mm driver unit in in-ear headphones is the size of the speakers. It means that each earbud has a 9 mm speaker.
The epiglottis is a flap of tissue that is found at the entrance of the larynx. Its size is about 7-9 mm in length.
It is in between a 9/16 inch and a 5/8 inch.
First off, there are two "types" of needle sizing. The first is the US method of measuring needles, and the second is the UK/Canada method of measuring. Therefore, there are two answers to your question. For US knitting needles, there are sizes: 0 (2.0 mm) 1 (2.25 mm) 2 (2.75 mm) 3 (3.25 mm) 4 (3.5 mm) 5 (3.75 mm) 6 (4.0 mm) 7 (4.5 mm) 8 (5.0 mm) 9 (5.5 mm) 10 (6.0 mm) 10 1/2 (6.5 mm) 11 (8.0 mm) 13 (9.0 mm) 15 (10.0 mm) 17 (12.0 mm) 19 (16.0 mm) 35 (19.0 mm) 50 (25.0 mm) For UK/Canada sizes, there are: 14 (2.0 mm) 13 (2.25 mm) 12 (2.75 mm) 11 (3.0 mm) 10 (3.25 mm) 9 (3.75 mm) 8 (4.0 mm) 7 (4.5 mm) 6 (5.0 mm) 5 (5.5 mm) 4 (6.0 mm) 3 (6.5 mm) 2 (7.0 mm) 1 (7.5 mm) 0 (8.0 mm) 00 (9.0 mm) 000 (10.0 mm)
Here you go: 1) Slip Stitch 2) Single Crochet 3) Half Double Crochet 4) Double Crochet 5) Treble Crochet 6) Single crochet increase 7) Single Crochet decrease 8) Double Crochet increase 9) Double crochet decrease 10) Treble Crochet increase
18 mm
9 MM
1 cm is equivalent to 10 mm. So, the size difference between 1 cm and 9 mm is 1 mm.