The lower (blue) square in the first picture is knitted on size 6 needles; the new Ruby square is knitted using size 7. Wow!

I decided to use the Oxford Gray for the half-squares and joining the squares. One ball was enough to do two half-squares, and join all of the squares (plus two strips). I’m hoping the second ball will cover the other two half-squares (and the remaining two strips to be joined together), and the third ball will hopefully be enough for a 3-stitch attached i-cord border.

Looks like I have 1 unused ball plus 48 grams of a partial ball of the Natural Heather, plus about 60 grams total of the Lion Brand Amazing from 3 different partial balls.

Ended up with 73 grams left of the Oxford Gray. I’m calling it 1/4 of a skein, to be on the safe side.