A standard bookshelf is neither too big nor too small and is an ideal choice for homes and personal use. It usually has a width of 31 inches and a depth of 13 inches. The number of shelves that the bookshelf has will determine its height. Such a standard bookshelf has an average capacity of holding books, magazines, and other items weighing a total of 18 kg to 136 kg. Apart from the dimensions of the bookshelf, it also depends upon the material and quality of the bookshelf. A standard good-quality wooden bookshelf is capable of holding an average capacity of 100 kg and more.