Two short horse questions? 10 points best wnswer?

What does it mean, I am looking for a horse and I found one that says great after spell. What does 'spell' mean?

Also does 14.3hh exist I thought it only went up to 11.2,12.2,13.2 etc
Update: yes i no that taller horses are very common i lease a 16.2 hh OTTB i was just wondering as i have never heard 14.3or like 16.3 i realize that horses go up tp 21hh or near that the tallest horse in the wirl
10 answers 10