So in browsing the crochet preemie hats on Ravelry, I decided to have a go with this "10 minute" pattern. But for some reason, my hats came out much smaller than hers, and didn't really have and give or stretch to them, so I decided to do one of my own. :) So, without further ado, I give you my Ribbed Crochet Preemie Hat (the pattern is given in US terms, but there is also a UK termed version below it):

(I used Rheatheylia's Divine Hat join method...I love that join!)
To join each round: join with slip stitch around the first front post double crochet of previous round (or beginning ch 2 of the first round), ch 2, then fpdc down into the same front post double crochet you just did the slip stitch to (again, this will be a ch 2 for the beginning round). This pushes the ch 2 behind the fpdc you just made (ignore the ch 2, it doesn’t exist). This isn’t necessary, but it looks better than a standard ch2 and makes the join less obvious.

Sport/baby weight yarn
Size G/4.25mm hook

fpdc = front post double crochet
bpdc = back post double crochet

R1: 11 dc in magic loop, join

R2: ch2, (fpdc in dc, dc in same st) around, join (22 sts)

R3: ch2, (2fpdc in fpdc, bpdc in dc) around, join (33 sts)

R4: ch2, (fpdc in fpdc, dc, fpdc in fpdc, bpdc in bpdc) around, join (44 sts)

R5: ch2, (fpdc in fpdc, bpdc in dc, fpdc in fpdc, bpdc in bpdc) around, join

R6-14: ch2, (fpdc in fpdc, bpdc in bpdc) around, join

R15: reverse sc around, join

Fasten off and weave in ends.

UK termed version:

To join each round: join with slip stitch around the first front post treble crochet of previous round (or beginning ch 2 of the first round), ch 2, then fptr down into the same front post treble crochet you just did the slip stitch to (again, this will be a ch 2 for the beginning round). This pushes the ch 2 behind the fptr you just made (ignore the ch 2, it doesn’t exist). This isn’t necessary, but it looks better than a standard ch2 and makes the join less obvious. The site I found this method at is linked above the US termed version.

Sport/baby weight yarn
Size G/4.25mm hook

fptr = front post treble crochet
bptr = back post treble crochet

R1: 11 tr in magic loop, join

R2: ch2, (fptr in tr, tr in same st) around, join (22 sts)

R3: ch2, (2fptr in fptr, bptr in tr) around, join (33 sts)

R4: ch2, (fptr in fptr, tr, fptr in fptr, bptr in bptr) around, join (44 sts)

R5: ch2, (fptr in fptr, bptr in tr, fptr in fptr, bptr in bptr) around, join

R6-14: ch2, (fptr in fptr, bptr in bptr) around, join

R15: reverse dc around, join

Fasten off and weave in ends.

  

(The green is done in Caron's Simply Soft and the pink is done in Red Heart's Baby Soft yarn.)

I don't mind if you sell projects resulting in use of this pattern, but please don't sell the pattern itself, and always provide the link/URL to the pattern where you sell it so others can enjoy crafting as well!