Size chart
Monica + Andy baby size chart
Monica + Andy publishes 8 baby and toddler sizes, Preemie to 18-24M, by weight and height. Checked against monicaandandy.com on October 4, 2026.
Size chart
- Preemieup to 5 lb
- Newborn5 to 9 lb
- 0-3M9 to 12 lb
- 3-6M12 to 16 lb
- 6-9M16 to 20 lb
- 9-12M20 to 24 lb
- 12-18M24 to 27 lb
- 18-24M27 to 30 lb
Weight in lb, exactly as Monica + Andy publishes it.
Does Monica + Andy run small or large?
True to sizeAcross 7 size labels that other brands also use, Monica + Andy's published ranges sit close to the middle of the pack. The same label covers about the same baby.
Based on published size charts compared with other brands. This is not a fit review.
What a typical baby wears in Monica + Andy
For a baby in the middle of the WHO growth chart, with room to grow. Your baby's own measurements give a closer answer in the calculator below.
| Age | Typical weight | Typical length | Monica + Andy size |
|---|---|---|---|
| Birth | 7.3 lb | 19.5 in | 0-3M |
| 3 months | 13.5 lb | 23.9 in | 3-6M |
| 6 months | 16.8 lb | 26.2 in | 6-9M |
| 9 months | 18.9 lb | 28 in | 9-12M |
| 12 months | 20.5 lb | 29.5 in | 9-12M |
| 18 months | 23.3 lb | 32.1 in | 18-24M |
| 2 years | 26.1 lb | 34 in | 18-24M+ |
| 3 years | 31.1 lb | 37.6 in | 18-24M+ |
The chart as published
The original wording from Monica + Andy's chart, size by size.
| Size | Weight | Height or length | Age |
|---|---|---|---|
| PREEMIE | Up to 5 lbs | Up to 17 in / Up to 43 cm | Not published |
| NEWBORN | 5-9 lbs | Up to 20 in / Up to 51 cm | Not published |
| 0-3M | 9-12 lbs | 18-23 in / 46-58 cm | Not published |
| 3-6M | 12-16 lbs | 23-26 in / 58-66 cm | Not published |
| 6-9M | 16-20 lbs | 26-28 in / 66-71 cm | Not published |
| 9-12M | 20-24 lbs | 28-30 in / 71-76 cm | Not published |
| 12-18M | 24-27 lbs | 30-31 in / 76-79 cm | Not published |
| 18-24M | 27-30 lbs | 31-33 in / 79-84 cm | Not published |
Notes on this chart. The brand publishes its chart as an image on its size chart page. Only a baby chart (Preemie to 18-24M) is published. Length in cm is the brand's own. The published 0-3M length range (18-23 in) starts below the Newborn maximum (20 in).
Sources
- Brand's own site: https://monicaandandy.com/pages/size-chart
- Brand's own site: https://cdn.shopify.com/s/files/1/2338/2917/files/baby_size_chart_large.png?v=1551822118
Retrieved October 4, 2026. Brands update their charts, so check the brand's page before a big purchase. This site is not affiliated with Monica + Andy.
Calculator
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