I think Mathide is the tallest crown princess, she defintely has 180cm tall. Mette-merit is a little short than Mathide and a little bit taller than Maxima. I think Maxima is 176cm and Mette-merit is 178cm. Mary and Victoria seems are in the same height which is about 172cm. Letizia is not that short as some people think, she is slim and looks short when stands beside her extremely tall husband and she is about 170cm tall. I have see some photos that she stands next to Maxima and she is not shorter than Mamima for more than 3 inches. Also, when i see the photos recently Queen Sofia stands next to Mary, I see Mary with obvious higher heels is only a bit slightly taller than Sofia with lower heels. So I believe Letizia would not shorter than Mary quite a lot, their height difference would between 1 to 1.5 inches only, the same as Victoria. Moreover, Massako and Marie-chantal have quite similar heights, they shouild be around 165cm. In addition, Marie is shorter than Mary about half head and more, so she maybe about 162-164cm, Alexandra seems shorter than Marie, so i wouid guess she is about 158-160cm. I know that I may not correct but I do feel interest to the height of royals, and I think it is quite difficult to judge because the royal ladies wear heels with different height. Anyway, this is only my opinion.