This is a pattern for a beanie or slouchy to fit approximately 58 cm or 23 inch Centre to Border Beanie or (C 2 B Beanie) and is based on the popular corner to corner (or C 2 C) blanket. It is worked from the Centre out, leaving the lovely ripple edge as your border. I prefer the increasing to the decreasing of the original blanket, and love the ripple edge which ends up lost in the blanket when completed that way. So came up with this way, as well as the C2B worked in 4 triangles, square (CC2BB) and Oblong CC2BB.
Basic Requirements

I used:
160 metres of Bendigo Luxury 8 ply (80 grams) for the beanie equivalent to approximately 175 Yards, and 194 meters (97 grams) equivalent to approximately 212 yards for the Slouchy / turned up brim.
4.5 mm hook or (4mm for a slightly smaller beanie.)
1 stitch marker for the beginning of round.

Note: You could also use your preferred yarn and appropriate hook size. If you do, then continue working until the rippled edge measures the size you are making.

Stitches used:

Chain (chain stitch) =
Yarn over and pull a loop through the loop already on hook.

UK or British Treble which is known as Double Crochet in US terminology =
Insert hook through stitch or space. Yarn over and pull up a loop. Two loops are now on your hook. Yarn over and pull through both loops on your hook.

Slip stitch = Insert hook into the space between the chain 3 and the next stitch. Yarn over and pull loop through the space AND through the stitch on your hook.

Considerations

1/ Always do your starting of the round chains loosely. If you have a tendency to chain tightly, you might struggle to get your hook into each chain when you come to the end of the round and need to “slip” into each chain in preparation for the next round. If you still struggle with this, you could try using a hook a few sizes smaller just for the slipping, then return to using your project hook.

2/ If you think you won’t recognise the start of the round, it would be very useful to use a stitch marker here.

A huge thank you to my friends and testers, Kerry Moreland and Sue Chappell for their invaluable feedback and beautiful work.