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 5 of 36 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Week 9: the Return Key on Your Laptop Anytime you press "enter" note that your baby's length (0.90 inches) is about the same size as that key. Previous Next Start Slideshow Pregnancy