Question: what is the difference between a double and twin?
Answer: Double/Full beds are 15" wider than a twin, but if two share the bed, each has only 27" of personal space—much less than a twin! ... Double beds (also known as full) were the most common for two to sleep in until the 1960s. They're only 15" wider than a single bed, leaving only 27" of sleep space for each of two adults.