I often get asked the difference between bobble stitch, popcorn stitch, clusters and puff stitch. They are all highly texturised stitches and can be used in sample blankets, to add texture to clothing, even as an edging on beanies.
The bobble stitch is fairly easy to make, but I wouldn't recommend it to newbie hookers as it requires full control over your hook and yarn.
A bobble can be made using 2 - 6 loops. I prefer 4 loops. It's neither too thick or too thin and creates a rather nice looking bobble.
Start by yarn over and inserting your hook in the designated stitch. Draw through stitch and up to the level of the work.
Yarn over and pull through the same stitch as many times as required. For a 4 loop bobble stitch you'll have to yarn over and pull through another three times. This will give you a total of 11 loops. Remember to keep it level with the top part of your stitch.
You should now have 11 loops on your hook. Yarn over one final time and pull through all the loops on your hook. Voila! One bobble stitch made!
It's better to do 1 chain stitch between bobbles if you want an evenly spaced row of bobbles, if you want it more texturised and thicker, omit the chain stitch and work your bobble in the very next open stitch.
Go, experiment and then dazzle friends and family with your awesome bobble making skills!