Adult neckie scarf is double sided hole scarf with garter stitch.

As for the size, this pattern include one size. If you make another size, just add some rows or increasing.

This total yarn requirements is approximately 150g, which is not so much.

Start with increasing stitches to make leaf shape, and divide stitches into 2 group. And them make 2 side of ribbing and put all stitches back together in a needle to make keyhole.

You will need

Yarn
Dk weight yarn

required
About 150g

Needles
3.5mm circular needle, extra 3.5mm needle(stick needle is fine)

notions
Marker, sewing needle

measurement
Width 18cm
Length 70cm