Brand vs brand

OshKosh B'gosh vs Wonder Nation sizes

Of OshKosh B'gosh's 9 baby and toddler sizes, 3 line up closely with a Wonder Nation size, 6 are partial matches, and 0 have no clean match. Both charts list weight and height, so the comparison uses both.

Closest pairs: OshKosh B'gosh 6M = Wonder Nation 3-6M, OshKosh B'gosh 24M = Wonder Nation 24M, OshKosh B'gosh 4T = Wonder Nation 4T.

Watch the labels: OshKosh B'gosh 12M is closer to Wonder Nation 12M than to Wonder Nation's own 12M; OshKosh B'gosh 18M is closer to Wonder Nation 18M than to Wonder Nation's own 18M; OshKosh B'gosh 24M is closer to Wonder Nation 24M than to Wonder Nation's own 24M.

OshKosh B'gosh 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)

OshKosh B'gosh

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)

OshKosh B'gosh

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

OshKosh B'gosh size to Wonder Nation size

OshKosh B'gosh	Closest Wonder Nation	Match	Weight: OshKosh B'gosh / Wonder Nation	Height: OshKosh B'gosh / Wonder Nation
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 OshKosh B'gosh size

Wonder Nation	Closest OshKosh B'gosh	Match	Weight: Wonder Nation / OshKosh B'gosh	Height: Wonder Nation / OshKosh B'gosh
Preemie	None	No clean match	up to 5 lb / n/a	up to 17 in / n/a
Newborn	None	No clean match	5.5 to 7.5 lb / n/a	17.5 to 21 in / n/a
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 OshKosh B'gosh size in Wonder Nation

Close match

OshKosh B'gosh 6M lines up closely with Wonder Nation 3-6M.

Weight (lb)

OshKosh B'gosh 6M 12.5 to 17 lb

Wonder Nation 3-6M 12.5 to 16 lb

Wonder Nation 6-9M 16.5 to 19 lb

Height (in)

OshKosh B'gosh 6M 24 to 27 in

Wonder Nation 3-6M 23.5 to 26 in

Wonder Nation 6-9M 26.5 to 27.5 in

The shaded column is the OshKosh B'gosh range. Bars show what each brand publishes for the size.

Based on published size charts. OshKosh B'gosh chart and Wonder Nation chart.

More comparisons

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