The scarf in the photos is done in a bulky weight yarn.
This zig-zag scarf works well in all weights of yarn, looking intricate and delicate in a laceweight and warm and decorative in a bulky weight.
The lace pattern is really easy to memorize and looks impressive!
Beginner's lace scarf
CO 17 stitches (3 lace repeats and 2 edge stitches).
Row 1(RS): K1, *ssk, K2, YO, K1,* repeat from * to * until last st, K1.
Row 2 and all even rows: Purl.
Row 3-7 : Repeat Row 1.
Row 9: K1, *K1, YO, K2, k2tog,* repeat from * to * until last st, K1.
Rows 11-15: Repeat Row 9.
Repeat rows 1-15 until desired length. BO.
To make the zig zag more or less pronounced, simply repeat Row 1 and Row 9 more times or less times.