Just delivered today, my baby is 1.5 months old now, I'm a bit confused about size S and XL (I finally found out that these two sizes are the same) , so I write to the seller, they replied quickly and with a photo to show how to measure the child's head. Below is part of seller's answer, hopefully it can help people who have the same question as me. After reviewing your case, I understand that you have a request for size S and size XL. Please provide the baby's head circumference for the size chart. The narrowest circumference of the child's head can be measured with a tape measure, place the tape measure in the middle of the forehead and all the way to the back of the head (see). The measurement should be made with a flexible tape measure. Size S: Baby's head circumference is 36-46cm, from 1 month to 10 months. Size M: baby's head circumference is 42-49cm, 5 months to 18 months. (Size S) and old Vision (Size XL) are exactly the same except for the label. There is no feature enhancement or subtraction between them. The reason for changing the label is that we offer different sizes. I will use it for my baby in 24 hours, I hope it is not too late and we can get a good result. If a miracle happens, I will upload after the photo, wish us good luck:)
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