You can find this free pattern on Ravelry.
I used about half a Schoppel Zauberball called “your blue eyes” to make these. To accentuate the shell pattern, I switched between dark and light parts of the yarn every two rows.
Sewing on the 28 buttons seemed to take forever (two evenings in fact) but they give them that certain something I think…
Fortunately they were finished before winter was over and I already got to wear them. They are warm and cozy – I love them.