They are a part of rules of football.
yellow and red cards
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)
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.
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.
Of course he has received 1 or more yellow and red cards. Yes
The deck has 108 cards with 25 of each color (red, green, blue, and yellow).