Don't know if this suggestion is too late, but if a couple of your motifs are too little, could you not just do another row around it in single or double crochet, whichever would get it up to size?
That is, if you have a little bit more thread in those colors. Just an idea.... I also liked another person's idea about a matching pillow, but I see you don't have that much yarn left!
Good luck to you.
Beth














