Cat & Jack Baby Size Chart — Fit by Weight & Height
Target Cat & Jack's published baby-clothing size chart, size by size — the weight and height each label covers, plus how Target Cat & Jack compares to 30 other brands. Based on Target Cat & Jack's own published chart (retrieved 2026-09-02); we compare brands' published charts and do not handle or test any garment.
Across its published chart, each Target Cat & Jack size covers about 1.1 lb less weight than the 30-brand median. If your baby is near the top of a weight range, consider sizing up in Target Cat & Jack.
Target Cat & Jack baby size chart (weight & height)
| Size | Fits weight | Height | 30-brand median | Target Cat & Jack vs median |
|---|---|---|---|---|
| Preemie | —–5.5 lb | —–17.5 in | 5.5 lb | 0 |
| Newborn | 6–8 lb | 18–20 in | 8 lb | 0 |
| 0-3M | 9–12 lb | 20.5–23.5 in | 12 lb | 0 |
| 3-6M | 12.5–16 lb | 24–25.5 in | 17 lb | -1 lb |
| 6-9M | 16.5–19.5 lb | 26–27.5 in | 20 lb | -0.5 lb |
| 12M | 20–23 lb | 28–30.5 in | 24 lb | -1 lb |
| 18M | 23.5–26 lb | 31–32.5 in | 27 lb | -1 lb |
| 24M | 26.5–28 lb | 33–35.5 in | 30 lb | -2 lb |
| 2T | 26.5–28 lb | 33–35.5 in | 31 lb | -3 lb |
| 3T | 28.5–32 lb | 36–38.5 in | 34 lb | -2 lb |
| 4T/4 | 32.5–37 lb | 39–43 in | — | — |
| 5T/4 | 37.5–42 lb | 43.5–44.5 in | — | — |
Read the “vs median” column to see where Target Cat & Jack differs: a positive number means that size covers heavier babies than the typical brand (runs bigger on paper); negative means smaller.
How we built this
There is no US standard for baby-clothing sizes, so the same label fits different weights at different brands. This page reproduces Target Cat & Jack's own published size chart and compares each size to the median of 30 brands from our Baby Clothing Size Index 2026. Figures are from Target Cat & Jack's published chart (retrieved 2026-09-02); we compare published charts only and never claim to have measured or tested a garment. For clothing fit only — not a guide to how much a baby should weigh.