Most domestic Koi usually grow about 12 to 15 inches long . Japanese Koi usually grow 22 to 26 inches in long. Jumbo sized Koi grow up to 34 to 36 inches long.
Most domestic Koi usually grow about 12 to 15 inches long . Japanese Koi usually grow 22 to 26 inches in long. Jumbo sized Koi grow up to 34 to 36 inches long.