You can choose, for our kids and junior beds, the option of a lower trundle bed or 2 lower drawers. The trundle bed is 90x190cm.
Once opened, the trundle bed is about 30cm high. It is more or less at the same height as the cot. The only thing you will have to bear in mind is that if you have chosen a mattress with a lower thickness for the lower drag bed than recommended, it will have a variation in height.