Brand vs brand

Carter's vs Wonder Nation sizes

Of Carter's 12 baby and toddler sizes, 4 line up closely with a Wonder Nation size, 7 are partial matches, and 1 has no clean match. Both charts list weight and height, so the comparison uses both.

Closest pairs: Carter's Up to 5 lb = Wonder Nation Preemie, Carter's 6M = Wonder Nation 3-6M, Carter's 24M = Wonder Nation 24M, Carter's 4T = Wonder Nation 4T.

Watch the labels: Carter's Preemie is closer to Wonder Nation Newborn than to Wonder Nation's own Preemie; Carter's 12M is closer to Wonder Nation 12M than to Wonder Nation's own 12M; Carter's 18M is closer to Wonder Nation 18M than to Wonder Nation's own 18M.

Carter's True to sizeWonder Nation Runs small

Based on published size charts compared with other brands.

Size by size, on one scale

Each block is one size, placed where the brand's chart puts it. Blocks that sit above each other fit the same baby.

Weight (lb)

Carter's

Up to 5 lb: up to 5 lb
Preemie: up to 6 lb
Newborn: 6 to 9 lb
3M: 9 to 12.5 lb
6M: 12.5 to 17 lb
9M: 17 to 21 lb
12M: 21 to 25 lb
18M: 25 to 28 lb
24M: 28 to 30 lb
2T: 29 to 31 lb
3T: 31 to 33 lb
4T: 33 to 37.5 lb

Wonder Nation

Preemie: up to 5 lb
Newborn: 5.5 to 7.5 lb
0-3M: 6.5 to 12 lb
3-6M: 12.5 to 16 lb
6-9M: 16.5 to 19 lb
12M: 19.5 to 22 lb
18M: 22.5 to 26 lb
24M: 26.5 to 30 lb
2T: 26.5 to 30 lb
3T: 30.5 to 34 lb
4T: 34.5 to 38 lb

Height (in)

Carter's

Up to 5 lb: up to 17 in
Preemie: up to 18 in
Newborn: 18 to 21.5 in
3M: 21.5 to 24 in
6M: 24 to 27 in
9M: 27 to 28.5 in
12M: 28.5 to 30 in
18M: 30 to 32 in
24M: 32 to 34 in
2T: 35 to 36.5 in
3T: 36.5 to 39 in
4T: 39 to 41.5 in

Wonder Nation

Preemie: up to 17 in
Newborn: 17.5 to 21 in
0-3M: 20.5 to 23 in
3-6M: 23.5 to 26 in
6-9M: 26.5 to 27.5 in
12M: 28 to 29.5 in
18M: 30 to 31.5 in
24M: 32 to 33.5 in
2T: 32 to 33.5 in
3T: 34 to 37.5 in
4T: 38 to 41.5 in

Carter's size to Wonder Nation size

Carter's	Closest Wonder Nation	Match	Weight: Carter's / Wonder Nation	Height: Carter's / Wonder Nation
Up to 5 lb	Preemie	Close match	up to 5 lb / up to 5 lb	up to 17 in / up to 17 in
Preemie	Newborn	No clean match	up to 6 lb / 5.5 to 7.5 lb	up to 18 in / 17.5 to 21 in
Newborn	Newborn	Partial	6 to 9 lb / 5.5 to 7.5 lb	18 to 21.5 in / 17.5 to 21 in
3M	0-3M	Partial	9 to 12.5 lb / 6.5 to 12 lb	21.5 to 24 in / 20.5 to 23 in
6M	3-6M	Close match	12.5 to 17 lb / 12.5 to 16 lb	24 to 27 in / 23.5 to 26 in
9M	6-9M	Partial	17 to 21 lb / 16.5 to 19 lb	27 to 28.5 in / 26.5 to 27.5 in
12M	12M	Partial	21 to 25 lb / 19.5 to 22 lb	28.5 to 30 in / 28 to 29.5 in
18M	18M	Partial	25 to 28 lb / 22.5 to 26 lb	30 to 32 in / 30 to 31.5 in
24M	24M	Close match	28 to 30 lb / 26.5 to 30 lb	32 to 34 in / 32 to 33.5 in
2T	3T	Partial	29 to 31 lb / 30.5 to 34 lb	35 to 36.5 in / 34 to 37.5 in
3T	3T	Partial	31 to 33 lb / 30.5 to 34 lb	36.5 to 39 in / 34 to 37.5 in
4T	4T	Close match	33 to 37.5 lb / 34.5 to 38 lb	39 to 41.5 in / 38 to 41.5 in

Wonder Nation size to Carter's size

Wonder Nation	Closest Carter's	Match	Weight: Wonder Nation / Carter's	Height: Wonder Nation / Carter's
Preemie	Up to 5 lb	Close match	up to 5 lb / up to 5 lb	up to 17 in / up to 17 in
Newborn	Newborn	Partial	5.5 to 7.5 lb / 6 to 9 lb	17.5 to 21 in / 18 to 21.5 in
0-3M	3M	Partial	6.5 to 12 lb / 9 to 12.5 lb	20.5 to 23 in / 21.5 to 24 in
3-6M	6M	Close match	12.5 to 16 lb / 12.5 to 17 lb	23.5 to 26 in / 24 to 27 in
6-9M	9M	Partial	16.5 to 19 lb / 17 to 21 lb	26.5 to 27.5 in / 27 to 28.5 in
12M	12M	Partial	19.5 to 22 lb / 21 to 25 lb	28 to 29.5 in / 28.5 to 30 in
18M	18M	Partial	22.5 to 26 lb / 25 to 28 lb	30 to 31.5 in / 30 to 32 in
24M	24M	Close match	26.5 to 30 lb / 28 to 30 lb	32 to 33.5 in / 32 to 34 in
2T	24M	Close match	26.5 to 30 lb / 28 to 30 lb	32 to 33.5 in / 32 to 34 in
3T	3T	Partial	30.5 to 34 lb / 31 to 33 lb	34 to 37.5 in / 36.5 to 39 in
4T	4T	Close match	34.5 to 38 lb / 33 to 37.5 lb	38 to 41.5 in / 39 to 41.5 in

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Size

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Every Carter's size in Wonder Nation

Close match

Carter's Up to 5 lb lines up closely with Wonder Nation Preemie.

Weight (lb)

Carter's Up to 5 lb up to 5 lb

Wonder Nation Preemie up to 5 lb

Height (in)

Carter's Up to 5 lb up to 17 in

Wonder Nation Preemie up to 17 in

The shaded column is the Carter's range. Bars show what each brand publishes for the size.

Based on published size charts. Carter's chart and Wonder Nation chart.

More comparisons

Charts retrieved October 4, 2026 (Carter's) and October 4, 2026 (Wonder Nation). Sources are listed on each brand page. This site is not affiliated with either brand.