Some categories of small laptop types include netbooks, ultraportables, laplets and thin-and-light notebooks. These categories are generally defined, with no industry standard for classifying laptops by size. Because of this, there is some crossover when classifying laptops, with some laptops fitting into more than one category.
Netbooks measure between 7 and 11 inches and weigh less than 3 pounds. They are the smallest and lightest category of laptop, and have the most modest performance specs. Netbooks' advantages include their light weight, long battery life, easy network connectivity and low cost. Disadvantages include low processing power, lack of a CD/DVD drive and small displays.
Ultraportables, also known as subnotebooks, range in size from 9 to 13 inches and weigh less than 3 pounds. Because of the high variance in size, ultraportables are best defined by their weight. Ultrabooks offer a good combination of performance, light weight and battery life, with their main disadvantage being a high price tag. Laplets are similar to ultraportables in size and performance, but they have touchscreens that can be separated from the keyboard to function as tablet devices.
Thin-and-light laptops can range from 11 to 16 inches and weigh between 4 and 6 pounds. This category is best defined by its weight. Their advantages include modular bays for optical drives or extra batteries, a good balance of performance and battery life, and good-sized displays. Disadvantages include less portability and a higher price tag than ultraportable laptops.