Sep18 29 weeks: 2 Butternut Squashes Posted on September 18, 2012 by admin 29 weeks: 2 Butternut Squashes 29 weeks: Baby is the size of a butternut squash Your baby is as big as a butternut squash, weightwise — about 2 1/2 pounds. (Length: a tad over 15 inches, head to heel.) Hmm, these fruits and veggies are odd choices.