When my dd(10) slept on the top bunk, there were bedrails there. I think they are built in...at least they looked like they were stationary. About 10"high or so and about 3 feet long. Those are guestimates....I didn't measure. They were quite adequate for her. My ds(2) slept on the bottom couch/bed. He'd never slept in a real bed before. We were going to request rails for him, but the couch is only about 2 feet off the carpeted floor, and we just tucked him in tightly with the covers each nite....He did roll out one night...but never woke up! I just picked him up and tucked him in tight again.