The Bunk bed mattress sizes are twin bunk bed 39 inches wide x 75 inches long and full bunk beds 54 inches wide and 75 inches long. These are fairly standard bunk bed size bed measurements. Bunk bed Mattress depths can vary from just a few inches to 6 inches or more. Bunk bed depths are very dependent upon bunk bed safety rail heights and there are VERY specific Federal regulations about this. Many times, actual bunk bed mattress dimensions will vary by one or two inches, usually smaller.
BUNK BED SAFETY: Please Visit the Consumer Product Safety Commission website for an in-depth look at bunk bed safety concerns. Because addresses change over time and we want to be sure you can access their current rules, please Google Federal Consumer Product Safety Commission and when on their site search Bunk beds. That will give you up to date bunk bed safety rules. We can never be too careful when children are concerned.