Short answers, pulled from the story.
Bill Belichick holds the all-time record with eight Super Bowl rings: six as head coach of the New England Patriots and two as defensive coordinator of the New York Giants. Tom Brady follows with seven rings as a player, six with the New England Patriots and one with the Tampa Bay Buccaneers.
The NFL contributes between $5,000 and $7,000 per ring for up to 150 rings for the winning team; any costs beyond that are paid by the franchise. The New England Patriots' Super Bowl XLIX rings were reported to cost $36,500 each, the most expensive Jostens had ever produced at that time, a record later surpassed by Super Bowl 50 and Super Bowl LI rings.
Most Super Bowl rings are manufactured by Jostens, a memorabilia company. The rings are typically made of yellow or rose gold with diamonds and customized with each player's name and uniform number.
In 2005, reports emerged that Russian President Vladimir Putin had taken a Super Bowl ring from New England Patriots owner Robert Kraft. Kraft initially said he had given it as a gift, but later said that statement was not true and had been issued under pressure from the White House. The ring remains on display at the Kremlin.
The New England Patriots' Super Bowl LI ring contains 283 diamonds, commemorating the team's comeback from a 28-3 deficit against the Atlanta Falcons late in the third quarter of that game. Falcons owner Arthur Blank reportedly confronted Patriots owner Robert Kraft in August 2017 over the perceived slight.
Tight end Marv Fleming was the first player to win four Super Bowl rings, collecting two with the Green Bay Packers in 1966 and 1967 and two more with the Miami Dolphins in 1972 and 1973.