Well, I never believed they could grow much after
age 4....
But a friend bought an Arab/Andalusian cross mare
that I rejected at age 5, since she was 14.3....just sticked her recently at age
8 and she is right about 15.2.....
Also, my Arab/QH mare, grew to just under 16h in
her 6th year (one inch).....I am ready for HER to stop growing!
They can grow well past 5, too. I bought
one last Feb., he measured 14.3 1/2h with a stick and level. Perfect
height. He was almost 6. As the year wore on, I swore he was
getting harder to get on. Measured him a couple of months ago with same
stick and level...#$%@ horse is now 15.1 1/2h. Grew 2 inches in less
than a year. I've told him to knock it off, it ain't funny.