Benches
Bench height follows the job. At a dining table, 17 to 19 inches matches the chairs it sits opposite. In an entryway, 17 to 19 inches suits putting shoes on. At the foot of a bed, 18 to 20 inches reads right against a standard mattress height.
Allow about 18 inches of width per person, and leave 24 to 30 inches of walkway in front. Every bench is made to order, so length can follow the table or the hall.