A full size mattress is the same length as a twin size bed but is made wider, which can accommodate a growing teenager who needs more space on her bed in order to sleep comfortably. A twin size mattress is 39 in. wide and 75 in. long and a full size is 54 in. wide and the same length. The extra width provides more room to stretch out, although if space is a concern, it may be tough to fit this size bed into a bedroom, so measure accordingly.
The mattress frame is important to ensure the mattress itself gets proper support, which can help it last a lot longer. For those with storage issues, a platform bed is a popular choice for full-size mattresses. The quality of platform beds can vary from the low-end particleboard frame to a more expensive hardwood such as oak or maple. Platform beds allow for extra storage space because they are often have storage drawers beneath the frame.
Another popular choice for teens looking to save space in their bedrooms is a futon. The mattress pulls out into a full-size bed and also provides a place for a teen and his friends to sit during the day or whenever he has company. Daybeds are another option for a teenager but are less likely to come in a full-size. Both of these frames can provide a place for friends to sit.
For teenagers or cohabitants sharing a room under extreme space concerns, bunk beds are an option and do come in full size. Most people associate bunk beds with twin-size framing, but that's not the case. You can purchase full size bunk beds in a variety of materials that include metal, pine, oak or maple wood. The support for a bunk bed is critical if using it for teenagers, and buyers must be sure it can support the amount of weight comfortably to avoid premature breaking or accidents.