White label vinyl records are generally 12-inch LPs, or 7-inch singles and come with a plain centre label (usually white) and are in plain packaging. The centre label might have handwritten details of the artist and title, or may be rubber stamped, or have a sticker applied.
Some white label records are test pressings made by the pressing plant, usually in quantities of 5 or less, and then listened to to check the sound quality before pressing larger runs.
Some white label records are produced for promotional purposes, including advance copies sent to retailers or to DJs. Sometimes white labels are used to conceal artist identities, so the record is listened to without prejudice. Dance music producers might produce white label copies to play in dance clubs to gauge crowd response.
Other white label records are unofficial or partially unofficial releases, for example if a remix was made without the consent of the artist or label.
Generally, white label records are not distributed to the general public.