Our bonnets run true to size, with a little wriggle room for growth.
The easiest way to size for a bonnet is to dig out that old tape measure and take two measurements:
Firstly from one temple, around the back of your little one's head and back to the other temple (that's what we'll call the circumference)
And secondly from one side of the jawbone, up over the top of your babe's forehead, and back down to the other side (that's the height)
Our bonnet sizes are approximately
0-3 months: 11.5" c x 12.5''h
3-6 months: 12.5" x 13.5"
6-12 months: 13.5" x 14.75"
12-18 months: 14" x 15.5"
18-24 months: 15.25" x 16.5"
For the best fit, your bonnet should be snug but if you're unsure about which size to pick we recommend you order the next size up (those wee babes grow so fast)