Step 1 — Height
Heel to crown.
Stand them barefoot against a wall, mark the top of the head, measure to the floor. For babies, lay them flat on their back with legs straight.
The fit guide
Find their right-now size.
Kids grow. The trick is buying for tonight without aging out by Sunday. Bamboo viscose forgives — generous through the chest and hip, real four-way stretch, soft after every wash. The pair you order for tonight stays in the rotation for months.
Between sizes? Always size up. Bamboo viscose hugs back on wash one, and you buy yourself a season of growth.
Size finder
Tell us their numbers.
Weight matters most — height is a tiebreaker. We'll give you the size that buys the most growing room.
Weight first, height second.
Most kids land between two sizes. When they do, the larger one wins — bamboo viscose tightens up on wash one.
| Size | Age | Weight | Height |
|---|---|---|---|
| 0–3M | 0–3 months | 7–12 lb | 19–23 in |
| 3–6M | 3–6 months | 12–16 lb | 23–26 in |
| 6–12M | 6–12 months | 16–22 lb | 26–29 in |
| 12–18M | 12–18 months | 22–26 lb | 29–31 in |
| 18–24M | 18–24 months | 26–29 lb | 31–33 in |
| 2T | 2 years | 28–32 lb | 33–35 in |
| 3T | 3 years | 32–36 lb | 35–38 in |
| 4T | 4 years | 36–42 lb | 38–42 in |
| 5/6 | 5–6 years | 42–55 lb | 42–48 in |
| 7/8 | 7–8 years | 55–70 lb | 48–53 in |
| 9/10 | 9–10 years | 70–90 lb | 53–58 in |
All measurements reflect your child's body, not the garment. The bamboo-viscose fabric has natural stretch — most pajamas in their size will fit a 1–2 lb range above the published top weight.
How to measure at home.
A soft tape and 30 seconds. If your child won't hold still, use a recent pediatrician weight + height — that's what most parents actually use.
Step 2 — Chest
Around the ribs.
Tape the fullest part of the chest, under the arms, parallel to the floor. Snug, not tight — you should be able to slide two fingers under.
Step 3 — Weight
Last well visit.
Pediatrician weight from the past 30 days is the most reliable. If you're between visits, weigh yourself, then weigh yourself holding them, and subtract.
Between sizes? Here's the rule.
01
Between two sizes, which one?
Always size up. Bamboo viscose softens and tightens after wash one — and they grow into the larger size faster than you'd like.
02
Tall and slim, or short and sturdy?
Pick whichever measurement is closer to the top of its bracket. Long legs cuff easily for a season — a tight chest does not.
03
How long should a size last?
Our generous cut and the fabric's natural stretch are designed to extend each size's window — room to grow, not just tonight's fit.
100-night trial
Still unsure? Try them on us.
Wear them. Wash them. Sleep in them. If the fit's off within your 100 nights, we'll take them back.