Crocheted collar for babies & kids ☆ The part that touches the neck uses 100% cotton yarn, so it can be used safely for babies. It feels gentle on the skin and is a perfect item for spring and summer coordination. It is a ribbon type, so it can be adjusted to fit your child's growth. It can be used from 0 to about 3 years old. Material... Neck and frill part: 100% cotton Bumpy part: 70% cotton, 25% acrylic, 5% nylon Neck circumference approx... 27-30cm Because it is a handmade item, there may be some slight deviations or distortions. Thank you for your understanding of handmade products when purchasing.