Brand vs brand

Old Navy vs OshKosh B'gosh sizes

Of Old Navy's 10 baby and toddler sizes, 5 line up closely with a OshKosh B'gosh size, 3 are partial matches, and 2 have no clean match. Both charts list weight and height, so the comparison uses both.

Closest pairs: Old Navy 0-3M = OshKosh B'gosh 3M, Old Navy 3-6M = OshKosh B'gosh 6M, Old Navy 6-12M = OshKosh B'gosh 9M, Old Navy 3T = OshKosh B'gosh 3T.

Old Navy True to sizeOshKosh B'gosh True to size

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)

Old Navy

Up to 7 lb: up to 6.6 lb
0-3M: 6.6 to 13.2 lb
3-6M: 13.2 to 17.6 lb
6-9M: 17.6 to 19.8 lb
6-12M: 17.6 to 22 lb
12-18M: 22 to 24.3 lb
18-24M: 24.3 to 26.5 lb
2T: 26.5 to 28.7 lb
3T: 28.7 to 33.1 lb
4T: 33.1 to 35.3 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

Height (in)

Old Navy

Up to 7 lb: up to 21.7 in
0-3M: 21.7 to 24 in
3-6M: 24 to 26.4 in
6-9M: 26.4 to 29.1 in
6-12M: 26.4 to 29.1 in
12-18M: 29.1 to 31.5 in
18-24M: 31.5 to 33.9 in
2T: 33.9 to 36.2 in
3T: 36.2 to 39 in
4T: 39 to 42.1 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

Old Navy size to OshKosh B'gosh size

Old Navy	Closest OshKosh B'gosh	Match	Weight: Old Navy / OshKosh B'gosh	Height: Old Navy / OshKosh B'gosh
Up to 7 lb	3M	No clean match	up to 6.6 lb / 9 to 12.5 lb	up to 21.7 in / 21.5 to 24 in
0-3M	3M	Close match	6.6 to 13.2 lb / 9 to 12.5 lb	21.7 to 24 in / 21.5 to 24 in
3-6M	6M	Close match	13.2 to 17.6 lb / 12.5 to 17 lb	24 to 26.4 in / 24 to 27 in
6-9M	9M	Partial	17.6 to 19.8 lb / 17 to 21 lb	26.4 to 29.1 in / 27 to 28.5 in
6-12M	9M	Close match	17.6 to 22 lb / 17 to 21 lb	26.4 to 29.1 in / 27 to 28.5 in
12-18M	12M	Partial	22 to 24.3 lb / 21 to 25 lb	29.1 to 31.5 in / 28.5 to 30 in
18-24M	24M	Partial	24.3 to 26.5 lb / 28 to 30 lb	31.5 to 33.9 in / 32 to 34 in
2T	2T	No clean match	26.5 to 28.7 lb / 29 to 31 lb	33.9 to 36.2 in / 35 to 36.5 in
3T	3T	Close match	28.7 to 33.1 lb / 31 to 33 lb	36.2 to 39 in / 36.5 to 39 in
4T	4T	Close match	33.1 to 35.3 lb / 33 to 37.5 lb	39 to 42.1 in / 39 to 41.5 in

OshKosh B'gosh size to Old Navy size

OshKosh B'gosh	Closest Old Navy	Match	Weight: OshKosh B'gosh / Old Navy	Height: OshKosh B'gosh / Old Navy
3M	0-3M	Close match	9 to 12.5 lb / 6.6 to 13.2 lb	21.5 to 24 in / 21.7 to 24 in
6M	3-6M	Close match	12.5 to 17 lb / 13.2 to 17.6 lb	24 to 27 in / 24 to 26.4 in
9M	6-12M	Close match	17 to 21 lb / 17.6 to 22 lb	27 to 28.5 in / 26.4 to 29.1 in
12M	12-18M	Partial	21 to 25 lb / 22 to 24.3 lb	28.5 to 30 in / 29.1 to 31.5 in
18M	18-24M	Partial	25 to 28 lb / 24.3 to 26.5 lb	30 to 32 in / 31.5 to 33.9 in
24M	18-24M	Partial	28 to 30 lb / 24.3 to 26.5 lb	32 to 34 in / 31.5 to 33.9 in
2T	3T	Partial	29 to 31 lb / 28.7 to 33.1 lb	35 to 36.5 in / 36.2 to 39 in
3T	3T	Close match	31 to 33 lb / 28.7 to 33.1 lb	36.5 to 39 in / 36.2 to 39 in
4T	4T	Close match	33 to 37.5 lb / 33.1 to 35.3 lb	39 to 41.5 in / 39 to 42.1 in

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Size

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Every Old Navy size in OshKosh B'gosh

Close match

Old Navy 0-3M lines up closely with OshKosh B'gosh 3M.

Weight (lb)

Old Navy 0-3M 6.6 to 13.2 lb

OshKosh B'gosh 3M 9 to 12.5 lb

OshKosh B'gosh 6M 12.5 to 17 lb

Height (in)

Old Navy 0-3M 21.7 to 24 in

OshKosh B'gosh 3M 21.5 to 24 in

OshKosh B'gosh 6M 24 to 27 in

The shaded column is the Old Navy range. Bars show what each brand publishes for the size.

Based on published size charts. Old Navy chart and OshKosh B'gosh chart.

More comparisons

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