big bowl :
cast on 60 stitches
increases in first row
decreases after 25 rows in every row

medium bowl :
cast on 48 stitches
increases in first row
decreases after 18 rows in every 2. row

little bowl :
cast on 36 stitches
increases and decrease like for the medium bowl.

I started to knit the big size first following the pattern.
I didn´t like the bottom part of the bowl which is way too large.
After shrinking it 2 times in the washing machine and a lot of pulling and stretching in all direction I finally liked the shape.

I canged the decreasing part for the other two bowls and I like it much better.
The shape is perfect after shrinking.