Quick answer: In a narrow entry, choose a console 10-14 inches deep and 30-34 inches tall, keep 36 inches of clear walkway, and hang a mirror or shelf 8-10 inches above the console.
An entryway needs three things: a surface for keys, a place to sit or store shoes, and something that makes the space feel welcoming.
Consoles
Slim consoles 10-14 inches deep fit most hallways. Length should leave at least 6 inches of wall on each side.
Benches
A seat height of 17-19 inches is comfortable for putting on shoes. Shoe-rack benches double the storage in the same footprint.
Shelves and mirrors
Hang them 8-10 inches above the console and keep the center around eye level.