Size & Fit Guide

Use the labeled size as your starting point, then consider how you prefer sleepwear to fit. Children grow at different rates, so age labels are a guide rather than a substitute for body measurements.

Baby pajamas

River’s Threads size Fit reference
Newborn Newborn
0–3 months 0–3 months
3–6 months 3–6 months
6–9 months 6–9 months
9–12 months 9–12 months
12–18 months 12–18 months
18–24 months 18–24 months

If your baby is between sizes, choose the larger size for comfort and room to grow. Shop baby pajamas.

Kids pajamas

River’s Threads size Fit reference
2–3 years 2–3 years
4–5 years 4–5 years
6–7 years 6–7 years
8–10 years 8–10 years

If your child is between sizes, choose the larger size. Shop kids pajamas.

Adults

Adult styles are offered in the sizes shown on each product page. Because measurements can vary by style, use the garment-specific details on the product page when available.

How to measure

  • Chest: Measure around the fullest part of the chest.
  • Waist: Measure around the natural waist without pulling the tape tight.
  • Hips: Measure around the fullest part of the hips.
  • Height: Measure standing straight without shoes.
Need help choosing a size?
Contact us with the product name and the size you are considering.