Brand vs brand

Burt's Bees Baby vs Primary sizes

Of Burt's Bees Baby's 11 baby and toddler sizes, 0 line up closely with a Primary size, 9 are partial matches, and 2 have no clean match. Both charts list weight and height, so the comparison uses both.

Watch the labels: Burt's Bees Baby Newborn is closer to Primary Newborn than to Primary's own Newborn; Burt's Bees Baby 0-3M is closer to Primary 0-3M than to Primary's own 0-3M; Burt's Bees Baby 3-6M is closer to Primary 3-6M than to Primary's own 3-6M.

Burt's Bees Baby True to sizePrimary 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)

Burt's Bees Baby

Preemie: up to 6 lb
Newborn: 6 to 9 lb
0-3M: 9 to 12.6 lb
3-6M: 12.6 to 17 lb
6-9M: 17 to 20.9 lb
12M: 20.9 to 24.9 lb
18M: 24.9 to 28 lb
24M: 28 to 30 lb
2T: 29 to 31 lb
3T: 31 to 33 lb
4T: 34 to 37.5 lb

Primary

Newborn: 5.1 to 9 lb
0-3M: 9 to 11.9 lb
3-6M: 11.9 to 15 lb
6-9M: 15 to 18.1 lb
6-12M: 15 to 22 lb
9-12M: 18.1 to 22 lb
12-18M: 22 to 26.9 lb
18-24M: 26.9 to 30 lb
2: 30 to 33.1 lb
3: 33.1 to 35.9 lb
4: 35.9 to 39.9 lb

Height (in)

Burt's Bees Baby

Preemie: up to 16.9 in
Newborn: up to 21.7 in
0-3M: 21.7 to 24 in
3-6M: 24 to 26.4 in
6-9M: 26.4 to 28.3 in
12M: 28.3 to 30.7 in
18M: 30.7 to 32.7 in
24M: 32.7 to 33.9 in
2T: 35 to 36.5 in
3T: 36.5 to 39 in
4T: 39 to 41.5 in

Primary

Newborn: up to 18.1 in
0-3M: 18.1 to 22.8 in
3-6M: 22.8 to 25.2 in
6-9M: 25.2 to 27.2 in
6-12M: 25.2 to 29.1 in
9-12M: 27.2 to 29.1 in
12-18M: 29.1 to 31.1 in
18-24M: 31.1 to 33.1 in
2: 33.1 to 35 in
3: 35 to 38.2 in
4: 38.2 to 40.9 in

Burt's Bees Baby size to Primary size

Burt's Bees Baby	Closest Primary	Match	Weight: Burt's Bees Baby / Primary	Height: Burt's Bees Baby / Primary
Preemie	Newborn	No clean match	up to 6 lb / 5.1 to 9 lb	up to 16.9 in / up to 18.1 in
Newborn	Newborn	Partial	6 to 9 lb / 5.1 to 9 lb	up to 21.7 in / up to 18.1 in
0-3M	0-3M	Partial	9 to 12.6 lb / 9 to 11.9 lb	21.7 to 24 in / 18.1 to 22.8 in
3-6M	3-6M	Partial	12.6 to 17 lb / 11.9 to 15 lb	24 to 26.4 in / 22.8 to 25.2 in
6-9M	6-12M	Partial	17 to 20.9 lb / 15 to 22 lb	26.4 to 28.3 in / 25.2 to 29.1 in
12M	12-18M	Partial	20.9 to 24.9 lb / 22 to 26.9 lb	28.3 to 30.7 in / 29.1 to 31.1 in
18M	18-24M	Partial	24.9 to 28 lb / 26.9 to 30 lb	30.7 to 32.7 in / 31.1 to 33.1 in
24M	18-24M	Partial	28 to 30 lb / 26.9 to 30 lb	32.7 to 33.9 in / 31.1 to 33.1 in
2T	3	No clean match	29 to 31 lb / 33.1 to 35.9 lb	35 to 36.5 in / 35 to 38.2 in
3T	2	Partial	31 to 33 lb / 30 to 33.1 lb	36.5 to 39 in / 33.1 to 35 in
4T	4	Partial	34 to 37.5 lb / 35.9 to 39.9 lb	39 to 41.5 in / 38.2 to 40.9 in

Primary size to Burt's Bees Baby size

Primary	Closest Burt's Bees Baby	Match	Weight: Primary / Burt's Bees Baby	Height: Primary / Burt's Bees Baby
Newborn	Newborn	Partial	5.1 to 9 lb / 6 to 9 lb	up to 18.1 in / up to 21.7 in
0-3M	0-3M	Partial	9 to 11.9 lb / 9 to 12.6 lb	18.1 to 22.8 in / 21.7 to 24 in
3-6M	3-6M	Partial	11.9 to 15 lb / 12.6 to 17 lb	22.8 to 25.2 in / 24 to 26.4 in
6-9M	3-6M	Partial	15 to 18.1 lb / 12.6 to 17 lb	25.2 to 27.2 in / 24 to 26.4 in
6-12M	6-9M	Partial	15 to 22 lb / 17 to 20.9 lb	25.2 to 29.1 in / 26.4 to 28.3 in
9-12M	6-9M	Partial	18.1 to 22 lb / 17 to 20.9 lb	27.2 to 29.1 in / 26.4 to 28.3 in
12-18M	12M	Partial	22 to 26.9 lb / 20.9 to 24.9 lb	29.1 to 31.1 in / 28.3 to 30.7 in
18-24M	18M	Partial	26.9 to 30 lb / 24.9 to 28 lb	31.1 to 33.1 in / 30.7 to 32.7 in
2	3T	Partial	30 to 33.1 lb / 31 to 33 lb	33.1 to 35 in / 36.5 to 39 in
3	2T	No clean match	33.1 to 35.9 lb / 29 to 31 lb	35 to 38.2 in / 35 to 36.5 in
4	4T	Partial	35.9 to 39.9 lb / 34 to 37.5 lb	38.2 to 40.9 in / 39 to 41.5 in

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Size

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Every Burt's Bees Baby size in Primary

No clean match

Burt's Bees Baby Preemie has no clean match in Primary. The nearest size is Newborn, with only a small overlap.

Weight (lb)

Burt's Bees Baby Preemie up to 6 lb

Primary Newborn 5.1 to 9 lb

Height (in)

Burt's Bees Baby Preemie up to 16.9 in

Primary Newborn up to 18.1 in

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

Based on published size charts. Burt's Bees Baby chart and Primary chart.

More comparisons

Charts retrieved October 4, 2026 (Burt's Bees Baby) and October 4, 2026 (Primary). Sources are listed on each brand page. This site is not affiliated with either brand.