Full Mattress Size. Both terms refer to mattresses measuring 54 inches by 75 inches. Is a full size bed good for couples.

8 10 ft. A queen mattress offers 750 more square inches of sleeping space than a full size mattress. Sufficient for adults that need more room than what a twin can offer.
The full size mattress is versatile enough to fit several kinds of sleepers of all ages children teens and single adults too.
53 x 75 134 5cm x 190 5cm. 6 8 ft. The full falls between a twin xl and a queen making it a mid level size. While wider than a twin or twin xl full size mattresses are still a bit too narrow for most couples to sleep comfortably.