It is worked sideways from cast on one stitch and increased one stitch at the end of every other row to binding off. It is asymmetrical with the first border knitted at the same time as the body.
Any yarn and colour will be great for it.
Gauge is unimportant.

Measurement: 63” top edge x 25” height

Many thanks to testers:
yarnpumpkin
beluke
Nascar2448
TexasKnitGirl

Note: You can sell your finished item.