Trunks came in all sizes when they were used primarily as luggage. Some were just big enough to accommodate hats, while others were built to hold entire wardrobes, including shoes. A normal steamer trunk, which is the most common of all the vintage trunks, is generally 39½ x 21 x 21 . When you're looking for placement for your trunk, make sure the interior is easily accessible if you plan on using it for items that you regularly use.