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 14 of 36 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 14 Week 18: iPhone 7 Take a good look at your iPhone 7. You have a fetus about as long (5.59 inches)! Previous Next Start Slideshow Pregnancy