I originally made this for my daughter, but had many people ask me about it and the pattern, so I wrote it down and first put it up on Ravely and desided it was time to shre it here :)

Tahki Cotton Classic in 2 colours (Colours A & B)
Sm- 2.50mm or as needed for gauge
Med- 3.25mm or as needed for gauge
Lg- 3.75mm hook or as needed for gauge

I don't have actual measurements, but the Small should fit a child and the medium should fit a small adult and the large shout fit an average size adult.

The medium size is shown in the photo.

Sm = 7dc per inch
Med = 6dc per inch
Lg = 5 dc per inch

If a larger size is still needed just adjust hook size up.

abbreviations:
ch = chain
slp st = slip stitch
sc = single crochet
dc = double crochet
st(s) = stitch(s)
sk = skip

Instructions:

(NOTE: the beginning ch 3 of every round always counts as the first stitch,
Rnds 1-9, Do not turn at the end of the rnds)

Top of cap:
With A, Ch 4, join in 4th ch from the hook to form chain loop

Rnd 1- (right side) ch 3, dc 12 times into the chain loop, join with slp st into the 3rd ch of 1st st. (13 stitches),

Rnd 2- Change to B , ch 3, dc into same st, [2 dc into next st] around, join with slp st into the 3rd ch of 1st st. (26 stitches)

Rnd 3- Change to A , ch 3, 2 dc in next st, [dc into next st, 2 dc into next st] around, join with slp st into the 3rd ch of 1st st. (39 stitches)

Rnd 4- Change to B, ch 3, dc in the next st, 2 dc in the next st,
[dc in the next 2 sts, 2 dc into the next st] around, join with slp st into the 3rd ch of 1st st. (52 stitches)

Rnd 5- Change to A, ch 3, dc in the next 2 sts, 2 dc in the next st,
[dc in the next 3 sts, 2 dc in the next st] around, join with slp st into the 3rd ch of 1st st. (65 stitches),

Rnd 6- Change to B, ch 3, dc in the next 3 sts, 2 dc in the next st,
[dc in the next 4 sts, 2 dc in the next st] around, join with slp st into the 3rd ch of 1st st. (78 stitches),

Rnd 7- Change to A, ch 3, dc in the next 4 sts, 2 dc in the next st,
[dc in the next 5 sts, 2 dc in the next st] around, join with slp st into the 3rd ch of 1st st. (91 stitches)

Rnd 8- Change to B, ch 3, dc in the next 5 sts, 2 dc in the next st,
[dc in the next 6 sts, 2 dc in the next st] around, join with slp st into the 3rd ch of 1st st. (104 stitches)

Rnd 9- Change to A, ch 3 dc in the next 14 dc, 2 dc in the next st,
[dc in the next 15 sts, 2 dc in the next st] around until the last 8 sts, dc in the next 7 sts, 2 dc in the last st, join with slp st into the 3rd ch of 1st st. (110 stitches)
Side of cap:
Rnd 10- (right side) Change to B, ch 3, 4 dc into the same st, sk next 4 sts,
[5 dc shell in the next st, sk next 4] around, join with slp st into the 3rd ch of 1st st. (22 shells)

Rnd 11- Change to A, ch 1, turn, sc into front loop of each st around, join with slp st into the 1st sc. (110 sc)

Rnd 12- Change to B, turn, (Note: shell is worked over the sc row into the back loop of the middle DC of previous shell) slp st into next 3 sts, ch 3, 4 dc into same st, sk 4 sts,
[5 dc shell in the next st, sk next 4] around, join with slp st into the 3rd ch of 1st st. (22 shells)

Rnds 13-20- repeat Rnds 11 & 12

Rnd 21- repeat Rnd 11 once more

Rnd 22- (do not change colour here) ch 2, turn, [sk next sc, dc into next sc, dc into skipped sc, X-stitch made], continue in X-stitch in each st around, join with slp st into the 1st dc of the 1st X-stitch, skipping over the beginning ch 2.
(55 X-stitches or 110 dc)

Rnd 23- ch 1, do not turn, [sc in dc, ch 2, slp st into side of sc, picot made, sc into next dc] around, sc in the last st, join with slp st in 1st sc, (55 picots, 55 sc) finish off, weave in all ends.