1. You owe additional tax and situations (2), (3), and (4), below, do not apply to you: Keep records for three years. 2. You do not report income that you should report, and it is more than 25% of the gross income shown on your return: Keep records for six years. 3. You file a fraudulent return: Keep records indefinitely. 4.
Twin Mattress. A twin mattress is the smallest possible mattress size, other than a crib-sized mattress. Twin mattress dimensions are approximately 38 inches wide by 75 inches long. Both twin and full sizes are approximately 75 inches long, which may be too short for some adults, especially men.
These dimensions are for the mattress â actual bed frames are a little larger to accommodate the mattress. Mattress thickness varies considerably. Cot sizes are not standardized and vary from 25 inches upwards. The cot size used to denote a double was 26 inches by 75 inches. A double is standardized at 54 inches.