It depends on the size of yarn used. For worsted weight size 4 yarn, it reccommends to use a size g or h hook. Check the yarn cover to see which size hook is reccommended for the yarn.
it is best to use an H or I size hook
If it's a bulky yarn then you should use hook size H and up. If it's thinner then stick to the smaller size hooks. If your hook is too small then the yarn will not fit on the hook and it may snag on the hook as your working.
A 5.0mm would be an H-8 hook.
You would need to know what yarn you are using - sport, worsted, bulky - and what pattern. Different stitches will use different amounts of yarn. Single crochet is more dense than double crochet and would use more yarn to make the same size finished product. Afghan stitch is also dense with same result. With worsted yarn I would estimate 2500-3000 yards. That is a really rough estimate, however, without more information. Your chosen pattern should specify the yarn to be used and how much. If you want to substitute yarn, you can compare other yarns with the same weight, number of ounces and yards.
I started out with an H hook, but, it depends on what project you are going to start with. The pattern and the yarn affect the hook size, but if you mean for learning, without a specific project in mind, you should work with the size hook you are comfortable with. If you are able, try the knife and pencil holds with different size hooks and see which one "feels" best to you. I learned using a J hook. I have taught folks who were more comfortable with an N or P, larger hooks. For classes I generally suggest students try an I hook which is a good mid-size hook. I have other hooks available in case there is a problem with that size. You might find that starting off you crochet either very tightly or very loosely. Tension will stabilize after practice. At that point, you will be better able to determine your "favorite" size.
A 3mm crochet hook is halfway between a C and D size in US sizes.
What you need for to crochet is Crochet Hook Size H or bigger Next you need 100% Cotton yarn 4ply you can get some at Walmart or if you hvae a Ben Franklin Craft Store or any kind of place that sells yarn. Now if you are a beginner at crocheting then you need to go to Youtube.com and type in How to crochet. Thanks and have fun Bye:)
A 3.5mm crotchet hook is usually an E sized hook. A G sized hook has the size of 4.0mm. Following is the set of seven size of crochet: E-3.5mm, G6-4.0mm, G7-4.5mm, H-5.0mm, I-5.5mm, J-6.0mm and K-6.5mm.
A. A. H. Abou Sehly has written: 'Studies on cotton fiber and yarn testing' -- subject(s): Cotton yarn, Cotton
Junior's bat are of Size H. Means under aged players can use this size of Bat
"H" is not a size for CO2 tanks