It is just under 150mm tall, there is a file in the raw files section for the black insert top part which is to help keep the flower standing up straight.
The insert can be resized slightly to get it to sit deeper inside the vase if you prefer.
I recommend using some pebbles in the vase to weigh it down which can also be used to hold the bottom of the stem in place.
The insert has a cylinder for the hole so can easily be resized or duplicated (for multiple flower holes) in Bambu Studio, it is printed without infill or top skin to save a little time and filament, it does not need to be glued in place.
This is printed using Spiral Vase mode so I don't recommend filling with water.