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.

01 of 12

Week 28

Pair of sneakers
Warren Millar -

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!

02 of 12

Week 29


Baby's Length: 15.75-16.25 in.

Baby's Weight: 2.5-2.75 lbs.

Baby's Size: Basketball

03 of 12

Week 30

folded wool swear
Anton Gvozdikov -

Baby's Length: 16.25-17 in.

Baby's Weight: 3 lbs.

Baby's Size: Thick Wool Sweater, Folded

04 of 12

Week 31

Soccer ball
John Steel -

Baby's Length: 17-18 in.

Baby's Weight: 3.5 lbs.

Baby's Size: Soccer ball

05 of 12

Week 32

5-lb. bag of potatoes
Michael Rí¶hrich -

Baby's Length: 18-19 in.

Baby's Weight: 4 lb.

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

06 of 12

Week 33

Medicine ball
James Cox -

Baby's Length: 19-19.5 in.

Baby's Weight: 4.5 lbs.

Baby?s Size: Medicine ball

07 of 12

Week 34

Medium pumpkin

Baby's Length: 19.5-20 in.

Baby's Weight: 5 lbs.

Baby's Size: Medium pumpkin

08 of 12

Week 35

throw pillow

Baby's Length: 20-20.5 in.

Baby's Weight: 5.5 lbs.

Baby's Size: Throw pillow

09 of 12

Week 36

Beach ball

Baby's Length: 20.25-20.75 in.

Baby's Weight: 6 lbs.

Baby's Size: Beach ball

10 of 12

Week 37

diaper bag

Baby's Length: 20.75-21 in.

Baby's Weight: 6.5 lbs.

Baby's Size: Diaper bag

11 of 12

Week 38


Baby's Length: 21-21.5 in.

Baby's Weight: 6.5-7 lbs.

Baby's Size: Watermelon

12 of 12

Week 39

Veer Images

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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