Crochet woolen skirt pattern

As promised, here's the skirt pattern...

I made it in two parts - the frontside and the backside.
My low waist measures 34'', so I had to do 59 ch to measure 17'' for the 1st part of the skirt.
I'm using American Eng crochet stitches.

Material
Crochet hook 6mm
Very thick wool  (I don't know the exact measure)

Waist - 59 ch (which was too much; I forgot that wool stretches a bit )
Round 1 (right side) - 59 ch, HDC in the 4th ch from the hok, 1 HDC in eac ch (56 HDC)
Rounds 2, 4, 6 (wrong side) - 4 FPDC and 4 BPDC, 7 times.
Rounds 3, 5 e 7 (RS) - 4 BPDC and 4 FPDC, 7 times.

Skirt
Round 8  - 1 SC in each of the 56 st
Round 9- 1 DC in eac 56 st
Rounds 10 and 11 -  3 shell in the 14th, 28th and 42nd st. Each shell is made like this: 1 DC, 1 ch, 1 DC in the same st
Round 12 - the same as ner 10 and 11, but with an increase in the shell: 1 DC, 2 ch, 1 DC.
Round 13 to... - do the necessary rounds to the desired lenght.

I would love to hear from you in case you try one too ;)