It is better to have the bonnet slightly big than to have it firm, so if you are unsure it's best to go up a size.
Vintage Bonnet sizing:
XS --- 0 months S --- 3 months M --- 6 months L --- 12 months XL --- 18 months
MADE ESPECIALLY FOR YOU: The Edmund & Rose collection is designed and hand made by the store owner Tina Barton who lives in Queensland, Australia. Each piece is made from beautiful fabrics using techniques that produce high quality garments. If your item is made from a printed fabric, like a floral or a printed design, the print placement may vary from the pictures shown. The wooden buttons used on your clothing may also vary depending on the selection I currently have available. Your new Edmund and Rose clothing will be beautifully unique, just like your child.