Wren has worn hers since she was 4/5 months old, and still wears them at almost 2 years old, with plenty room to grow! Sizing details are below. ππΌ
These are onesize: they fit toddler and up to small adult (5 foot 120lbs) best. They are a fishnet base so they can absolutely accommodate up to a small size adult. While they are fitted for toddlers people have gotten creative and rolled the waist, and bunched the feet to use them for infants.