My baby is 5-months-old. Based on the size chart, I ordered 6-9 months. I like the fabric, same as MORI onesies I purchased before. However, the cuffs on the sleeves and legs are not stretchy as the main fabric and they are chocking my baby’s arms and legs. I already removed the tags so I couldn’t return them. I had to alter by removing the cuffs and he looks more comfortable. I also wish that there are two zippers go both ways or half zipper with snaps on the bottom for easier diaper changes. All other MORI clothes are good. Just the short rompers didn’t work unfortunately. I had talked with the representative and sent pictures of the measurements he asked. Hopefully that helps to improve the rompers in the future.