Hi Mike,
Here's a body line from my farm you may not have seen yet. The owner of this Showa has gotten her up to 24" @ 32 months old. Notice the gradual curves back to the tail. The Grandmother of this female Showa was 34". Also, older Showa siblings in Texas and in Florida are up to 29" @ 5 and 1/2 years old. Sankes here are at 29" & 30" also. Obviously VERY few Koi make it over 30", but Koi from my farm are certainly capable of it.
Best Wishes,
Brady Brandwood
