The vector stencils library "Soccer pictograms" contains 27 association football pictograms.
"Players, equipment, and officials.
Each team consists of a maximum of eleven players (excluding substitutes), one of whom must be the goalkeeper. ...
The basic equipment or kit players are required to wear includes a shirt, shorts, socks, footwear and adequate shin guards. ...
A game is officiated by a referee, who has "full authority to enforce the Laws of the Game in connection with the match to which he has been appointed" (Law 5), and whose decisions are final. The referee is assisted by two assistant referees. In many high-level games there is also a fourth official who assists the referee and may replace another official should the need arise." [Association football. Wikipedia]
The football clipart example "Design elements - Soccer pictograms" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Soccer solution from the Sport area of ConceptDraw Solution Park.