i made this back in October, actually, but I’m a slacker at posting stuff.
It’s very easy –
chain the length you want over your shoulder.
Dc across chain, turn, repeat until you get the width you want from your neck down your arm.
Dc to the halfway point (fold the panel in half to mark the halfway point).
Ch the remaining length (count stitches for the best results), turn.
Repeat dc across until you have the same rows as your first side.
Optional – add a fancy edge or simple sc.