I don't know if I did the math right but she would be approximately 1071 meters. I used the cruise ship as an measurement, thinking it would be a voyager with the average height of 63 meters. By counting how many ships would make to fill her size I, using my 2 fingers measured how much the voyager would filled up with the giantess leg. Once I found that out we head into real life.

Cross referencing this into real life I count how many of the Voyagers would it take to reach my height. I counted 17 times.

using that information: 17 x 63m = 1071 meters in height.

This is only a rough estimate as the variable of the ship type the cruiser ship was got me to 1450 meters when I referenced it with a similar looking cruise ship which was bigger (Forgotten the name, Sorry).

So I could safely say she would be about 1km in height cross referencing the smallest cruise ship in the world give or take and 1.5km+ with a larger or largest cruise ship.