This is a top down crescent shape shawlette with an optional border. It’s an ideal design for using those gorgeous multi coloured or self striping yarns
The Araucania Botany Lace Yarn has been listed as a 4ply on Ravelry. I think it’s more a heavy laceweight or maybe a 3ply.
I used a size 3.75mm needle for the Araucania Botany Lace Yarn and for the Noro Sekku I used a 3.5mm needle