Popsugar Parenting Pregnancy How Big Is My Baby? A Week-by-Week Fetus-Size Guide Based on Objects You Actually Know 8 June 2018 by Annie Gabillet View On One Page Photo 19 of 36 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 19 Week 23: a Box of Rice-A-Roni A box of the San Francisco treat is approximately the size of the other treat in your belly, 11.38 inches. Previous Next Start Slideshow Pregnancy