This bed is so beautiful and sturdy perfect for my 14 month old. He can climb in and out of it without an issue. I used a 8inch mattress and there’s still a good amount of rail height left. Only reason I’m. It giving this a 5 star is because there’s a bit of a gap left after you place the mattress but you can easily cover it with 2 pillows. Also, the lock on the door gets a little stuck … other than that, Im absolutely in love with this bed, it’s perfect and I can lay in there with my baby when he’s having rough nights.