Size Guide
from snug to oversized, every style fits a little differently. check out our size guides below to find the fit that's just right for you.
our zippered rompers are designed to grow with your baby. measure your little one from shoulder to toe and match to the length column; this is the most reliable guide.
💡all sizes NB to 18-24m include the convertible foot cuff
our two-piece sets have a relaxed fit that moves with growing kids. size based on your child's height for the best fit.
💡 if your little one is between sizes, go up. they'll wear it longer and the fit stays cozy rather than clingy.
our women's pajama sets have an oversized, flowy fit: choose your usual size or size down for a more fitted look.
measure at the fullest part of your bust, natural waist, and hips to find your best match.
our men's pajama sets have a relaxed, oversized fit: choose your usual size for extra comfort or size down for a more fitted look.
measure around the fullest part of your chest and your natural waist to find your best fit.
Still not sure? email us at hello@sundaylittles.com — we're happy to help you find the right size.