This cap is worked in the round, with a cable of “wedding rings” as the main feature.

The pattern repeat is 7 stitches (increasing to 11 stitches for cable) and cap can be worked in different sizes by adding or decreasing number of stitches by a multiple of 7.

The fun part of this hat is the cable of intersecting “wedding rings”.
One tricky part is that the beginning of the round will move forward or back in order to keep the cable rings intersecting.