Bunk Beds

[RealLifeMama]

I am wanting to purchase white bunk beds for my girls' bedroom. I want twin over twin. I don't want them clunky.
I have visited a couple of furniture stores, and the beds they have are really short. We have 9 foot ceilings, so they don't have to be short. I want the girl on the bottom to be able to sit up and not hit her head, which seems to be the problem with the ones they have sat on.
My boys have This End Up beds that are really old and my son who is 5'2" can sit up on the bottom bunk. But they are not the style we want. I also want the rail to be fairly high so I am not worried my DD will roll off. DH wants solid wood, but I don't really care.

I am fine purchasing online, but I am not sure how to get a measurement of how high the clearance is from the bottom to top bunk when shopping online.
Anyone have a good recommendation?

https://www.bedbathandbeyond.com/sto...f7be6b596b5fa4
These look OK to me, but I am not sure what 76% rubberwood/25%MDF means, or if the rail is high enough, or if the clearance is OK.