Full size mattress also termed as double-beds.
Dimensions: 53″ x 75″
Recommended for: Single sleeper under 5’5″
Flaw: not recommended for adults, most especially the men.
Queen size mattress
Dimensions: Dimensions: 60″ x 80″
Recommended for: Guest rooms or smaller bedrooms. Also good for a single sleeper who wants more room in bed.
Flaw: There is little personal space for couples sharing a queen size bed.
King size mattress
Dimensions: Dimensions: 76″ x 80″
Recommended for: Best for couples who long to have a big personal space in spite sharing a bed together.
Flaw: May be too bulky or hard to handle especially when moving spaces.