This pattern is for a bracelet. It only requires a small amount of leftover stash yarn.

Any size yarn will work according to the results you want.

The designer recommends worsted weight yarn probably medium weight.

The stitch is the lobster stitch which she refers to as Romanian cord stitch. Also called macrame stitch.

What I especially liked is the flower which is crocheted at the end of the cord without stopping or attaching.

The only sewing is the button and weaving in loose ends.