According to Shulchan Aruch Orech Chayim 671:6, the maximum hight of a Menora, is 20 amot:
מניחו למעלה מג' טפחים ומצוה להניחו למטה מעשרה טפחים ואם הניחו למעלה מעשרה טפחים יצא אבל אם מניחו למעלה מעשרים אמה לא יצא:
One should place [the Hanukkah light] above three handsbreadths [from the ground]. It is a mitzvah to place it beneath ten handsbreadths. But if he placed it above ten handsbreadths, he has fulfilled his obligation. However, if he placed it above twenty cubits, he has not fulfilled his obligation.
The measurements are measured to the flame of the candle [Pri Megadim (M”Z 671:5]
There seems to be dispute about what exactly is the world's largest
chanukia, but all the contenders are well over 20 amot. (a b c d)
Well, are they actually over 20 amot? Let's examine closely:
According to Rav Moshe Fainstein¹, 20 amos would be 35'5"
According to Rav Chaim Noeh¹ it's 31'6"
According to the Chazon Ish³ it's 40 ft
So let's examine the example you gave:
In the first article about the tallest menorah, it mentions that the menora is 32 feet. Too tall according to Rav Chaim Noeh but not according to the others.
The second and fourth article don't seem to give a size.
The third article says that the Menora is 33.5 feet tall. Again under 20 amos according to Rav Moshe and Chazon Ish.
Measurements taken from Halachipedia one amah according to rav moshe, is 21.25 that times 20 and divided into feet, equals 35'5"
Measurements taken from Halachipedia one amah according to rav chaim naeh, is 18.90 that times 20 and divided into feet, equals 31'6"
Measurements taken from Halachipedia. One amah according to the chazon ish, is 24". that times 20 and divided into feet, equals 40 feet.