Brand vs brand

Old Navy vs Gerber Childrenswear sizes

Of Old Navy's 10 baby and toddler sizes, 2 line up closely with a Gerber Childrenswear size, 8 are partial matches, and 0 have no clean match. Both charts list weight and height, so the comparison uses both.

Closest pairs: Old Navy 0-3M = Gerber Childrenswear 0-3M, Old Navy 3-6M = Gerber Childrenswear 3-6M.

Watch the labels: Old Navy 3T is closer to Gerber Childrenswear 24M/2T than to Gerber Childrenswear's own 3T; Old Navy 4T is closer to Gerber Childrenswear 3T than to Gerber Childrenswear's own 4T.

Old Navy True to sizeGerber Childrenswear 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

Gerber Childrenswear

Preemie: up to 5.1 lb
Newborn: 5.1 to 7.9 lb
0-3M: 7.9 to 11.9 lb
0-6M: up to 16.1 lb
3-6M: 11.9 to 16.1 lb
6-9M: 16.1 to 20.1 lb
12M: 20.1 to 24 lb
18M: 24 to 28 lb
24M/2T: 28 to 32 lb
3T: 32 to 35.1 lb
4T: 35.1 to 39 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

Gerber Childrenswear

Preemie: up to 17 in
Newborn: 17 to 21 in
0-3M: 21 to 24 in
0-6M: 17 to 26 in
3-6M: 24 to 26 in
6-9M: 26 to 28 in
12M: 28 to 30 in
18M: 30 to 32 in
24M/2T: 32 to 34 in
3T: 34 to 38 in
4T: 38 to 40 in

Old Navy size to Gerber Childrenswear size

Old Navy	Closest Gerber Childrenswear	Match	Weight: Old Navy / Gerber Childrenswear	Height: Old Navy / Gerber Childrenswear
Up to 7 lb	Newborn	Partial	up to 6.6 lb / 5.1 to 7.9 lb	up to 21.7 in / 17 to 21 in
0-3M	0-3M	Close match	6.6 to 13.2 lb / 7.9 to 11.9 lb	21.7 to 24 in / 21 to 24 in
3-6M	3-6M	Close match	13.2 to 17.6 lb / 11.9 to 16.1 lb	24 to 26.4 in / 24 to 26 in
6-9M	6-9M	Partial	17.6 to 19.8 lb / 16.1 to 20.1 lb	26.4 to 29.1 in / 26 to 28 in
6-12M	6-9M	Partial	17.6 to 22 lb / 16.1 to 20.1 lb	26.4 to 29.1 in / 26 to 28 in
12-18M	12M	Partial	22 to 24.3 lb / 20.1 to 24 lb	29.1 to 31.5 in / 28 to 30 in
18-24M	24M/2T	Partial	24.3 to 26.5 lb / 28 to 32 lb	31.5 to 33.9 in / 32 to 34 in
2T	3T	Partial	26.5 to 28.7 lb / 32 to 35.1 lb	33.9 to 36.2 in / 34 to 38 in
3T	24M/2T	Partial	28.7 to 33.1 lb / 28 to 32 lb	36.2 to 39 in / 32 to 34 in
4T	3T	Partial	33.1 to 35.3 lb / 32 to 35.1 lb	39 to 42.1 in / 34 to 38 in

Gerber Childrenswear size to Old Navy size

Gerber Childrenswear	Closest Old Navy	Match	Weight: Gerber Childrenswear / Old Navy	Height: Gerber Childrenswear / Old Navy
Preemie	Up to 7 lb	No clean match	up to 5.1 lb / up to 6.6 lb	up to 17 in / up to 21.7 in
Newborn	Up to 7 lb	Partial	5.1 to 7.9 lb / up to 6.6 lb	17 to 21 in / up to 21.7 in
0-3M	0-3M	Close match	7.9 to 11.9 lb / 6.6 to 13.2 lb	21 to 24 in / 21.7 to 24 in
0-6M	3-6M	Partial	up to 16.1 lb / 13.2 to 17.6 lb	17 to 26 in / 24 to 26.4 in
3-6M	3-6M	Close match	11.9 to 16.1 lb / 13.2 to 17.6 lb	24 to 26 in / 24 to 26.4 in
6-9M	6-9M	Partial	16.1 to 20.1 lb / 17.6 to 19.8 lb	26 to 28 in / 26.4 to 29.1 in
12M	12-18M	Partial	20.1 to 24 lb / 22 to 24.3 lb	28 to 30 in / 29.1 to 31.5 in
18M	18-24M	Partial	24 to 28 lb / 24.3 to 26.5 lb	30 to 32 in / 31.5 to 33.9 in
24M/2T	18-24M	Partial	28 to 32 lb / 24.3 to 26.5 lb	32 to 34 in / 31.5 to 33.9 in
3T	4T	Partial	32 to 35.1 lb / 33.1 to 35.3 lb	34 to 38 in / 39 to 42.1 in
4T	4T	No clean match	35.1 to 39 lb / 33.1 to 35.3 lb	38 to 40 in / 39 to 42.1 in

Try it

Compare any size

I know the size in

Size

What is that in

Every Old Navy size in Gerber Childrenswear

Close match

Old Navy 0-3M lines up closely with Gerber Childrenswear 0-3M.

Weight (lb)

Old Navy 0-3M 6.6 to 13.2 lb

Gerber Childrenswear Newborn 5.1 to 7.9 lb

Gerber Childrenswear 0-3M 7.9 to 11.9 lb

Gerber Childrenswear 0-6M up to 16.1 lb

Height (in)

Old Navy 0-3M 21.7 to 24 in

Gerber Childrenswear Newborn 17 to 21 in

Gerber Childrenswear 0-3M 21 to 24 in

Gerber Childrenswear 0-6M 17 to 26 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 Gerber Childrenswear chart.

More comparisons

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