#1 - Plain Silver engraved, child size

http://www.medicalert.com/emblems/a156.jpg

#2 - Ltd Edition Dark Blue, Small

http://www.medicalert.com/emblems/A655.jpg

If you use their telephone number to order, they will have you take a measurement and custom-size the bracelet.  Last time I tried, the website would not allow you to customize the bracelet chain.