You may have an odd sized bed, specially if it a Queen it may be a short queen. Same width as a regular queen but only 70 inches long.
A queen Memory foam can be cut by you to fit cheaper than having a short queen ordered.
Any good mattress store should be able to help you with a short queen. Call a store and ask about a short queen. The answer the person on the other end gives will tell you whether you even want go to that store. Short queens can be ordered many places online includng Amazon and EBAY
