Popsugar Family Pregnancy Baby Growth Chart For Men A Guy's Guide to Your Baby's Size August 4, 2014 by Leah Rocketto View On One Page Photo 15 of 22 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 Week 18 He may not know how to refill a roll of toilet paper, but hopefully dad-to-be knows how big one is, because that's the size of your baby. Previous Next Start Slideshow Pregnancy