In January, shortly after Flash and I met, he measured 53" at the wither... or 13.1 hands. Today September 18, 2011. (7 months later) he is 57" at the wither and 59" at the rump or 14.1 hands at the point of the shoulder, or wither, and 14. 2 hands and about a year and a half old.
The indication that Flash is about to hit another growth spurt starts in his barrel... his ribs will show ever so slightly and then "bam"the next day either his rump or his wither will be a little bit taller than the day before. (Horses are funny, they will grow tall in the front then the back end will catch up and grow more than the front end and then it will have to catch up. This goes on for the first 4 years (at least) of a horse's life.