Pattern is designed by Birgit Freyer and available as free download Kunigunde
https://www.ravelry.com/patterns/library/kunigunde-2

New Regia Design Line by Arne & Carlos makes colorful projects super simple. The beautiful lace pattern on this striking pair of socks is as fetching as it is fun to knit and much too pretty to hide in shoes. The gorgeous colors are reminiscent of the Norwegian night sky.

Finished dimensions:
To fit 38/39 foot. Complete sock’s total foot length measures 25 cm.

Yarn information:
Schachenmayr Regia 4-ply Design Line by Arne & Carlos,
100 g in color 03653 Star Night
1 skein
459 yards

This design is also in Ravelry as Kunigunde and R0013