一如其他运动，足球球衣除所穿的衣服外，还泛指一切球员所穿着的标准衣服和其他装备。国际足球总会的足球比赛规则列明了每名球员最少需要穿着的装备，并明文禁止对自身及其他球员危险的衣装。个别比赛可能会对球衣实施其他规定，例如限制衣服上的商标大小，或客队的球衣颜色如与主队相近，客队必需穿着其他颜色球衣等。

足球员一般会将其球员号码置于球衣的背面。以前足球员的球衣号码均大约按照其位置安排为1号至11号。但于专业比赛中，球员会分配一个号码，于该球季内将不会变更。专业足球会经常把球员的姓氏或暱称印于号码的上方或下方（较为罕见）。

In association football, kit (also referred to as strip or soccer uniform) is the standard equipment and attire worn by players. The sport's Laws of the Game specify the minimum kit which a player must use, and also prohibit the use of anything that is dangerous to either the player or another participant. Individual competitions may stipulate further restrictions, such as regulating the size of logos displayed on shirts and stating that, in the event of a match between teams with identical or similar colours, the away team must change to different coloured attire.