If you just want to make a basic hat or are trying to make a pattern for one, here's how to do it.
Step 1: 12 dc (or sc or whatever size stitch you want...I'll use dc here) in a magic ring
OR
Ch 4, join with slip stitch to first ch, 12 dc around
Step 2: Ch 3 (counts as first dc), dc in same dc, [2 dc] in each around
Step 3: Ch 3, dc in same dc, dc in next dc, [2 dc in next dc, dc in next dc] around
Step 4: Ch 3, dc in same dc, dc in next 2 dc, [2 dc in next dc, dc in next 2 dc] around
Step 5: Ch 3, dc in same dc, dc in next 3 dc, [2 dc in next dc, dc in next 3 dc] around
Step 6: Ch 3, dc in same dc, dc in next 4 dc, [2 dc in next dc, dc in next 4 dc] around
Use this pattern of increasing until your circle reaches the following diameters (courtesy of
Crochet in Color):
*Remember diameter is all the way across through the center of the circle.
Age Diameter of circleNewborn 4 inches3-6 months 5.5 inches9-12 months 6-6.5 inches24 months 6.5-6.75 inchesToddler and small child 7 inchesAdult woman 7.25-7.5 inches
Once you've reached the diameter for the size you want, dc in each around until you've reached the following length:
Age Finished LengthNewborn 5 inches3-6 months 6-6.5 inches9-12 months 7 inches24 months 7-7.5 inchesToddler and small child 7.5- 8 inchesAdult woman 8.5-9 inchesLarge adult 10 inches
You can continue to dc (or sc or whatever stitch you decided to do) in each around until you've reached your length and stop there, or a nice finishing technique would be to fpdc or fpsc for the last inch or 2.