flat head baby pillow
http://jeffreydcbw273.angelfire.com/index.blog/1670489/8-goto-resources-about-baby-head-support-pillow-prevent-flat-head-plagiocephaly/
Will work rather well and super rapidly! My daughter started out getting a flat head and this helped spherical her head once more in significantly less then each week! The pillow alone is quite small and lovable