Originally, a player needed only to be notified that he was cautioned or sent off in order for that sanction to be applied. In the era of international play, language barriers sometimes prevented this notification from being properly administered. Referee Ken Aston introduced the concept of showing yellow and red cards to indicate cautions and sendings-off, respectively, in 1966 in order to traverse language barriers.
They are a part of rules of football.
yellow and red cards
about the size of a playing card in a original deck.
No. Red and yellow cards have always been roughly the same size and shape since they were introduced by legendary referee Ken Aston in 1966.
In soccer, a red card may be issued for things such as extremely hard fouls, violent or offensive conduct, a flagrant handling offense to prevent a goal, and other similar offenses. It should also be noted, however, that two yellow cards in one game leads to a red card as well.
See below site- Some players like Yaya Toure have had no red cards at all and 3 yellow cards, and some players like Tomas Repka have had about 18 red cards and 22 yellow cards (lol)
This season he has got no red cards or yellow cards so far!
260 yellow cards 17 red cards.
Vinnie Jones, around 104 cards in his career, 12 of which were red cards
Lahm
yes
Actually before becoming a professional footballer he had received 21 yellow cards and 15 red cards, then after signing on as a pro-footballer to this date he has received 28 red cards and 58 yellow cards.