He took about 4.5 hours and is on gesso'd birch ply wood panel 12" x 12".
And below is Etta, in a limited palette of Burnt Umber, Burnt Sienna, White and Ultramarine Blue. (from photo reference) about 11 x 13"
A few quick figures..
That would be Signe (in hat), Mery ( two top series of gestures), then Signe and Mery again at the bottom of this group.