Because a queen-size mattress is typically 6 to 7 inches wider and 5 inches longer than a full-size mattress, a bed frame designed to accommodate a queen-size mattress would not provide adequate support for a smaller one. The discrepancy could lead to potential injury.
A standard queen-size mattress is approximately 60 inches wide by 80 inches long, according to the Better Sleep Council. In contrast, a standard full-size mattress is approximately 53 inches wide by 75 inches long. The side rails on a queen bed frame would not be able to provide the necessary stability to keep the full-sized mattress securely in place. Only a queen bed frame that uses extensive cross support, such as a frame that uses a large number of wooden slats, would be able to support a full-sized mattress. However, it would still leave gaps between the mattress and the side of the bed.