Hello, below is a picture of the measurements i did for my toilet, the circle part is for the table top and counter top sink, to that marking its 90 cm from floor.

My question is, when people say 90 cm from flooring, does that mean including my counter top sink, it must not go beyond that line ? Or the edge of my table top must not go beyond that line ?

I think the bottom of counter top is until that line....

Don't like me, ask the contractor properly....
Mine too low cos my mom short...
End up all the bottom area too short can't get any ready make rack to use...
As those ready made rack minimum 80 cm height....
Mine only 70 cm height...

TS, can use formula to count your desired height.