seveninch

Seven-inch refers to a length equal to seven inches (177.8 millimeters). It is used in the imperial system to denote short distances and is commonly abbreviated as 7 in or 7". The term appears in various contexts, including measurement for equipment sizes, display diagonals, and media formats.

In music, seven-inch discs are vinyl records with a diameter of 7 inches. They are widely known as 7" singles and are used for releasing a main track with a potential B-side. Most commonly, 7" singles are played at 45 revolutions per minute, though exceptions exist that use 33 1/3 rpm. A typical side carries roughly 3 to 6 minutes of audio, making the format ideal for singles, promos, and limited editions.

The seven-inch format has played a significant role in popular music since its introduction in the mid-20th century, offering a compact and affordable alternative to larger vinyl sizes. It remains popular in various genres, notably punk, reggae, indie, and hip-hop, and is often prized by collectors for rare or picture-sleeve releases and limited presses.

In contemporary usage, seven inches also appear in technology and design contexts as a diagonal measurement for small displays, tablets, e-readers, and embedded screens. The term functions as a concise descriptor across industries and is precisely convertible to metric units (7 inches equals 177.8 millimeters).