How Big is the Amaryllis?!

I didn't realize that your amaryllis was that tall,  my daughter commented when she walked into the room. Close-up photos don't give an accurate sense of its size.

How big is it? I wondered... and measured...

From the pot to the tip of the flower was 31 inches (79 cm).

The first flower to bloom was 8 inches by 7 inches... (20 cm by 18 cm).

I wonder if this is what the plant measured last year when it first bloomed for me, its bulb encased in wax... Or was the enriched soil I transplanted the bulbs in - the soil that claimed to grow bigger plants - the reason why the plant is now so tall?! 

I wonder...