They are best friends and so they spend much time together and so there are many pictures of them together and so you find out that what agencies say about their heights can't be true..
According to their agencies Ana Beatriz is 5'11"/180 cm tall and Alessandra is 5'91/2"/177 cm
But Ana always towers over Alessandra! look at this pictures..
But perhaps in this case it's not the shorter that is not telling the truth because Ana is always so tall compared to average models ...
We all know agencies downgrades heights of models who are more than 6'0" tall and I think Ana is one of them..