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How Big Is Your Baby in First Trimester?

front view of couple touching mom's first trimester belly
Wonder how big your baby is now? Here's an approximate look at size, weight and height in the first trimester.
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Joseph Calev - Fotolia.com
Joseph Calev - Fotolia.com

Week 4

Baby's Length: <.25 in.="">

Baby's Weight: <.25 oz.="">

Baby's Size: Poppy seed

All length measurements in the first trimester are considered crown-to-rump (head-to-butt) because your baby's still too small to get an accurate head-to-toe assessment.

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ROBYN MACKENZIE - Fotolia.com
ROBYN MACKENZIE - Fotolia.com

Week 5

Baby's Length: <.25 in.="">

Baby's Weight: <.25 oz.="">

Baby's Size: Peppercorn

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Week 6

Baby's Length: <.25 in="">

Baby's Length: <.25 in="">

Baby's Size: Lentil

4 of 11
Tomas Loutocky - Fotolia.com
Tomas Loutocky - Fotolia.com

Week 7

Baby's Length: <.25-.33 in.="">

Baby's Weight: <.25 oz.="">

Baby's Size: Coffee bean

5 of 11

Week 8

Baby's Length: .50 - .75 in.

Baby's Weight: <.25 oz.="">

Baby's Size: Blueberry

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Fotolia.com
Fotolia.com

Week 9

Baby's Length: 1 - 1.25 in.

Baby's Weight: <.25 oz.="">

Baby's Size: Peppermint candy

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Week 10

Baby's Length: 1.25 - 1.75 in.

Baby's Weight: <.25 oz.="">

Baby's Size: Grape

8 of 11
Peter Krumhardt
Peter Krumhardt

Week 11

Baby's Length: 1.5 - 2.5 in.

Baby's Weight: .25 oz.

Baby's Size: California Roll

9 of 11

Week 12

Baby's Length: 2.5 - 3 in.

Baby's Weight: .50 oz.

Baby's Size: Pacifier

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Week 13

Baby's Length: 2.5 - 3 in.

Baby's Weight: .50 - 1 oz.

Baby's Size: Egg

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For more comparisons, check out your baby's size in the second and third trimesters!

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