This shawl is knitted from tip to tip in a shallow triangle.

This pattern could be worked in various yarn and made as large or small as you like.

These videos in German show the increases and decreases step by step:

Part 1 start and increases: https://www.youtube.com/watch?v=Hm_t2fCZ7Nw

Part 2 increases: https://www.youtube.com/watch?v=yVMDv9RDknk

Up+down part 1 decreases: https://www.youtube.com/watch?v=yLy-h_A_bCI

Up+down part 2 decreases and bind-off: https://www.youtube.com/watch?v=cgfGZEOtmRY