How Big Is Your Baby in Third Trimester?

Wonder how big your baby is now? Here's an approximate look at size, weight and height in the third trimester.

Everything in this slideshow

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Warren Millar - Fotolia.com

Week 28

Baby's Length: 15.25-15.75 in.

Baby's Weight: 2.25-2.5 lbs.

Baby's Size: Pair of sneakers



All length measurements in the third trimester are now full-length (instead of just head-to-butt), because your baby's big enough to describe them more accurately!

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Week 29

Baby's Length: 15.75-16.25 in.

Baby's Weight: 2.5-2.75 lbs.

Baby's Size: Basketball

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Anton Gvozdikov - Fotolia.com

Week 30

Baby's Length: 16.25-17 in.

Baby's Weight: 3 lbs.

Baby's Size: Thick Wool Sweater, Folded

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John Steel - Fotolia.com

Week 31

Baby's Length: 17-18 in.

Baby's Weight: 3.5 lbs.

Baby's Size: Soccer ball

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Michael Rí¶hrich - Fotolia.com

Week 32

Baby's Length: 18-19 in.

Baby's Weight: 4 lb.

Baby's Size: 5-lb. bag of potatoes

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James Cox - Fotolia.com

Week 33

Baby's Length: 19-19.5 in.

Baby's Weight: 4.5 lbs.

Baby?s Size: Medicine ball

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Week 34

Baby's Length: 19.5-20 in.

Baby's Weight: 5 lbs.

Baby's Size: Medium pumpkin

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Week 35

Baby's Length: 20-20.5 in.

Baby's Weight: 5.5 lbs.

Baby's Size: Throw pillow

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Week 36

Baby's Length: 20.25-20.75 in.

Baby's Weight: 6 lbs.

Baby's Size: Beach ball

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Week 37

Baby's Length: 20.75-21 in.

Baby's Weight: 6.5 lbs.

Baby's Size: Diaper bag

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Week 38

Baby's Length: 21-21.5 in.

Baby's Weight: 6.5-7 lbs.

Baby's Size: Watermelon

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Veer Images

Week 39

Baby's Length: 21.5 in.

Baby's Weight: 7-7.5 lbs.

Baby's Size: Newborn




All content on this Web site, including medical opinion and any other health-related information, is for informational purposes only and should not be considered to be a specific diagnosis or treatment plan for any individual situation. Use of this site and the information contained herein does not create a doctor-patient relationship. Always seek the direct advice of your own doctor in connection with any questions or issues you may have regarding your own health or the health of others.

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