To get a sense of baby size by week, check out our baby fruit size guide comparing your little one’s approximate length and weight to those of an array of fruits and vegetables.
How big is my baby?
The next time you walk through the grocery store, spend a few minutes perusing the produce aisle. Comparing your baby to something edible is a practice that goes back centuries. In olden times, people used common agricultural items (like seeds, nuts, and fruits) to estimate the sizes of babies in the womb.
These days, we have more variety – including fruits and veggies from around the globe. BabyCenter’s baby fruit size comparisons were the first on the web, started in 1997 by staffers who noticed that parents call babies-to-be “little peanut” or “little bean,” so we ran with it.
Just so you know, these fruit and veggie comparisons are just for fun – they’re not exact, and healthcare providers don’t measure embryos and fetuses this way. If you have any questions or concerns about your baby’s growth, talk to your provider.
A pile of poppy seeds on a blue background
4 weeks: Your baby is the size of a poppy seed
Your pregnancy may be detectable in a week or so by a home pregnancy test.
Read more about what’s happening at 4 weeks pregnant.
A pile of sesame seeds on an orange background
5 weeks: Your baby is about the size of a sesame seed
Your baby looks more like a tiny tadpole than a human – for now!
Read more about what’s happening at 5 weeks pregnant.
A pile of lentils on a light blue background
6 weeks: Your baby is about the size of a lentil
Your little lentil is now about 1/4 of an inch long.
Read more about what’s happening at 6 weeks pregnant.
A blueberry on a green background
7 weeks: Your baby is about the size of a blueberry
Your baby has doubled in size since last week and is now about 1/2 an inch long.
Read more about what’s happening at 7 weeks pregnant.
A raspberry on a blue background
8 weeks: Your baby is about the size of a raspberry
Your little one is now just over 1/2 an inch long and is constantly moving and shifting.
Read more about what’s happening at 8 weeks pregnant.
A grape on a pink background
9 weeks: Your baby is about the size of a grape
Your baby now weighs almost an ounce and is almost 1 inch long. Their eyes are fully formed, but the eyelids will be fused shut until 27 weeks.
Read more about what’s happening at 9 weeks pregnant.
A strawberry on a green background
10 weeks: Your baby is about the size of a strawberry
Your baby now weighs a little over an ounce and is a little over 1 inch long from head to bottom.
Read more about what’s happening at 10 weeks pregnant.
A fig on an orange background
11 weeks: Your baby is about the size of a fig
At just over 1 1/2 inches long from head to bottom, your baby is still teeny-tiny – so while they’re already kicking and stretching, you won’t feel their acrobatics for another month or two.
Read more about what’s happening at 11 weeks pregnant.
A lime on a pale pink background
12 weeks: Your baby is about the size of a lime
Your lime-sized little one now weighs about 2 ounces and is just over 2 inches long.
Read more about what’s happening at 12 weeks pregnant.
A plum on a blue background
13 weeks: Your baby is about the size of a plum
Your little plum is now about 2 1/2 inches long and weighs about 2 1/2 ounces.
Read more about what’s happening at 13 weeks pregnant.
A lemon on a green background
14 weeks: Your baby is about the size of a lemon
Your baby – now weighing more than 3 ounces and measuring almost 6 inches from head to heel – can squint, frown, grimace, pee, and possibly suck their thumb.
You may wonder why this week’s length measurement is so much bigger than last week.
Until 13 weeks of pregnancy, babies are measured from the top of their head to their bottom. That’s because their legs are curled up against their torso during the few weeks of pregnancy, so they’re hard to measure. From here on, you’ll see the head-to-heel measurements.
Read more about what’s happening at 14 weeks pregnant.
An apple on a yellow-green backround
15 weeks: Your baby is about the size of an apple
The future apple of your eye now weighs more than 4 ounces and is about 6 1/2 inches long from head to heel.
Read more about what’s happening at 15 weeks pregnant.
An avocado on a light blue-green background
16 weeks: Your baby is about the size of an avocado
Your baby now weighs 5 ounces and is 7 inches long.
Read more about what’s happening at 16 weeks pregnant.
A turnip on a blue background
17 weeks: Your baby is about the size of a turnip
Your little turnip now weighs about 6 1/3 ounces and is roughly 8 inches long.
Read more about what’s happening at 17 weeks pregnant.
A bell pepper on a blue-green background
18 weeks: Your baby is about the size of a bell pepper
Your baby now weighs almost 8 ounces and is more than 8 1/2 inches long from head to bottom. If you’re having a girl, her uterus and fallopian tubes are formed and in place. If you’re having a boy, his genitals are noticeable now, but he may hide them from you during an ultrasound.
Read more about what’s happening at 18 weeks pregnant.
A pomegranate on a yellow background
19 weeks: Your baby is about the size of a pomegranate
Your pomegranate-sized baby now weighs more than 9 1/2 ounces and is roughly 9 1/2 inches long.
Read about your baby’s development at 19 weeks.
A banana on a blue background
20 weeks: Your baby is about the length of a banana
Your burgeoning baby now measures about 10 inches from head to heel, and weighs roughly 11 1/2 ounces.
Read more about what’s happening at 20 weeks pregnant.
A mango on a blue background
21 weeks: Your baby is about as big as a mango
Your mango-sized cutie is now a little over 10 1/2 inches from head to heel and weighs about 14 ounces.
Read more about what’s happening at 21 weeks pregnant.
A sweet potato on a green background
22 weeks: Your baby is about the size of a sweet potato
At 11 1/2 inches and a little over 1 pound, your baby is starting to look like a miniature newborn as their lips, eyelids, and eyebrows become more distinct.
Read more about what’s happening at 22 weeks pregnant.
A grapefruit on a blue background
23 weeks: Your baby is about the size of a grapefruit
Your baby now weighs about 1 1/4 pounds and is more than a foot long – and if you turn on some tunes and sway to the music, they can feel you dance.
Read more about what’s happening at 23 weeks pregnant.
An ear of corn on a pink background
24 weeks: Your baby is about as long as an ear of corn
Your baby is now about 12 1/2 inches long from head to heel and weighs nearly 1 1/2 pounds.
Read more about what’s happening at 24 weeks pregnant.
An acorn squash on a light blue background
25 weeks: Your baby is about the size of an acorn squash
Your baby now rivals the average acorn squash in weight – about 1 3/4 pounds – and is roughly 13 1/4 inches long from head to heel.
Read more about what’s happening at 25 weeks pregnant.
A spaghetti squash on a green background
26 weeks: Your baby is about the length of a spaghetti squash
Your baby, now nearly 14 inches from head to heel and roughly 2 pounds, may be able to hear both your voice and the voices of people you talk to.
Read more about what’s happening at 26 weeks pregnant.
A head of cauliflower on a yellow background
27 weeks: Your baby is about the size of a head of cauliflower
Your baby is now as hefty as a head of cauliflower, weighing in at about 2 1/3 pounds and measuring roughly 14 1/2 inches.
Read more about what’s happening at 27 weeks pregnant.
An eggplant on a green background
28 weeks: Your baby is about the size of a large eggplant
Your baby now weighs about 2 2/3 pounds, is almost 15 inches long from head to heel, and can blink their eyes (which now sport lashes).
Read more about what’s happening at 28 weeks pregnant.
A butternut squash on a green background
29 weeks: Your baby is about the size of a butternut squash
Your baby now weighs more than 3 pounds and is about 15 1/2 inches long.
Read more about what’s happening at 29 weeks pregnant.
A head of cabbage on a pink background
30 weeks: Your baby is about the size of a large cabbage
Your baby tips the scales this week at almost 3 1/2 pounds and is almost 16 inches long.
Read more about what’s happening at 30 weeks pregnant.
A coconut on a green background
31 weeks: Your baby is about the size of a coconut
Your baby now weighs almost 4 pounds and measures about 16 1/2 inches long.
Read more about what’s happening at 31 weeks pregnant.
A papaya on a blue background
32 weeks: Your baby is about the size of a papaya
Your baby is taking up more and more space in your uterus, weighing in at about 4 1/3 pounds and measuring nearly 17 inches from head to heel.
Read more about what’s happening at 32 weeks pregnant.
A pineapple on an orange background
33 weeks: Your baby is about the size of a pineapple
Measuring 17 1/3 inches from head to heel and weighing about 4 3/4 pounds, your baby is rapidly losing that wrinkled, alien look, and their bones are hardening.
Read more about what’s happening at 33 weeks pregnant.
A canteloupe on a yellow-green background
34 weeks: Your baby is about the size of cantaloupe
Your melon-sized munchkin now weighs about 5 1/4 pounds and is almost 18 inches long.
Read more about what’s happening at 34 weeks pregnant.
A honeydew on a light green background
35 weeks: Your baby is about the size of a honeydew melon
Your baby, now weighing in at 5 3/4 pounds and measuring more than 18 inches long, doesn’t have much room to maneuver in your belly.
Read more about what’s happening at 35 weeks pregnant.
A head of romaine lettuce on a pink background
36 weeks: Your baby is about as long as a head of romaine lettuce
Your not-so-little lettuce now measures more than 18 1/2 inches from head to heel and weighs more than 6 pounds (and is still packing it on at a rate of about an ounce a day).
Read more about what’s happening at 36 weeks pregnant.
A bunch of Swiss chard on a green background
37 weeks: Your baby is about the length of a bunch of Swiss chard
Your baby measures roughly 19 inches from head to heel and weighs about 6 2/3 pounds.
Read more about what’s happening at 37 weeks pregnant.
A mini watermelon on a light green background
38 weeks: Your baby is about the length of a mini watermelon
Your baby is now about 19 1/2 inches long and weighs more than 7 pounds.
Read more about what’s happening at 38 weeks pregnant.
A pumpkin on a blue background
39 weeks: Your baby is about the size of a pumpkin
Your precious pumpkin now weighs about 7 1/2 pounds and is nearly 20 inches long from head to heel.
Read more about what’s happening at 39 weeks pregnant.
A large watermelon on a light blue background
40 weeks: Your baby is about the size of a watermelon
Your baby could arrive any day now, if they aren’t here already. The average newborn weighs about 8 pounds and is about 20 inches long.
Read more about what’s happening at 40 weeks pregnant.
