How Big Is Your Baby in First Trimester?

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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Week 4

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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Week 5

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

Week 6

Baby's Length: <.25 in

Baby's Length: <.25 in

Baby's Size: Lentil

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Week 7

Tomas Loutocky - Fotolia.com

Week 7

Baby's Length: <.25-.33 in.

Baby's Weight: <.25 oz.

Baby's Size: Coffee bean

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Week 8

Week 8

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

Baby's Weight: <.25 oz.

Baby's Size: Blueberry

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Week 9

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

Week 10

Baby's Length: 1.25 - 1.75 in.

Baby's Weight: <.25 oz.

Baby's Size: Grape

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Week 11

Peter Krumhardt

Week 11

Baby's Length: 1.5 - 2.5 in.

Baby's Weight: .25 oz.

Baby's Size: California Roll

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Week 12

Week 12

Baby's Length: 2.5 - 3 in.

Baby's Weight: .50 oz.

Baby's Size: Pacifier

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Week 13

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!