A little over 1/2 an inch and haven't measured her since dec/Jan because I thought she was done. No growth in the last 2 years. Could be the iodine, or not, with this one, I was just amazed that she had actually grown. My 13 year old grew 3/4 of an inch in less than a month when she first started. My daughters have always had a slower growth pattern than most children. They were both national level gymnasts for many years (20-24 hour a week)which I'm sure slowed their growth pattern but both have been out of this for several years now.