To crochet a basic beanie you will need
yarn and a crochet hook. You can use anything from crochet thread to
super bulky yarn with appropriate hook for it. Then you will need to
decide which stitch you want to crochet your beanie with. Single
crochet will give you a nice, tight material and it will be easier to
control the size. My favorite is the half double crochet. You get the
convenience of a small stitch, yet slightly bigger than a single
crochet. You could go double crochet, but then you get into a more
loose fabric which might let in more cold air. Still, it's your
decision.
You want to start off with a small
beginning ring, or as I like to do, crochet into the first chain of
your beginning chain. It should be large enough to hold your first
round of stitches and will give you the smallest crown 'hole'. For
single crochet hats chain 2, for half double also chain 2 and for
double crochet chain four, with the ch-3 being your first stitch, you
will need 11 more.
Your first round will depend on which
stitch you select. Single crochets should only need a starting number
of six, half double crochets need a starting number of eight and
double crochets need a starting number of twelve.
Your next rounds will consist of
increasing by your starting number each time, evenly around, until
your crown is large enough. This will depend on if the hat is for a
preemie, a newborn, a baby, a toddler, a child, a teen or an adult.
Your best bet here would be to measure the head that the hat is meant
for, and then crochet a circle that has a diameter of roughly one
quarter that. My head is 22” around and I usually make my crown to
about 6” diameter. For a beret-style hat, make the crown roughly
half the measurement of the head it is meant for.
Then you will crochet in even rounds
until the hat is the right length. That's just about it. Easy-peasy.
Now if you want a slouchy hat, you can
simply crochet around until it's slouchy enough before ending off.
For a beret-style you would make an even bigger starting circle,
crochet evenly for four to six rounds and then decrease (Using the
beginning number of stitches you started with-6/8/12/etc) until the
hat is the right size. Here you might want to attach a single crochet
ribbing band.
To attach a ribbing band, you will want
to switch out your hook for another that is at least two sizes
smaller than the one you were using. In other words, if you were
using a size K hook, then you would switch to a size I hook. Then you
will chain a length for however wide you want your ribbing to be,
plus one to turn. Then single crochet into the second chain from hook
and all other chains. Then you will slip stitch into the next two
stitches of your hat and turn. You will now work in the back loops
only of your band. Skip the two slip stitches and single crochet into
each single crochet of your band. Chain one and turn. Single crochet
back up to your hat and slip stitch into the next two stitches and
turn. Got the pattern? Do this all the way around the hat, until you
reach the beginning of the band and end up at the outside edge of the
band. Slip stitch the last row of the band to the free loops of the
beginning chain and you're done!
Really, it's all up to you what you want to do with your hats, I'm just giving some basic guidelines to get you started.