General
Matching socks and halfmitts.
This is such an easy and versatile pattern!
Buttons from my own stash.

Mods
Following ilsefin's mod and adding a placket & buttons.
Cast on 128 stitches. Neck ribbing plain 1x1 rib for 8 rows with 8 stitches on either side in garter for the placket. First buttonhole on row 5, second on row 16, third row 27, fourth row 38, fifth row 49. Ended placket after five more rows.
First increase row after 25cm. Used lifted increases. Made three increase rows = 300 stitches.
Knitted 20cm after last increase. Changed to red and decreased kn2tog k8 = 270 stitches left. Ribbing 1k1p for 8 rows.