First Threads products tend to fit bigger/ more true to size than traditional baby brands.
Please refer to the sizing chart below - measurements are in cm:
If your child is, well, a child, and measuring seems impossible - here are two anecdotal scenarios to help you decide sizing:
- Typically weighs in the 85th to 90th percentile for age.
- Average height but solid build.
- Wears true to age size.
- Weight & height tend to fall around the 20th percentile for age.
- Very slender with a long torso.
- Can either wear one age size down or roomy true to age size in tops.
- Wears one age size down in pants (too slim for the waistband in true to age size).