The numbers on the team must all be the same color and size. Manufacturer's logos and typography do not have to be identical on ladies' volleyball outfits. Shoes, socks, and kneepads do not have to be identical because they are not considered part of the uniform. Numbering systems used by volleyball teams include single-elimination tournaments with a three- or four-game final series for each position; double-elimination groups with a five-match first round followed by a best-of-three championship match; and perfect-round robin competitions with each player playing every other player in a group either twice or once depending on how many players there are in a league or tournament. In single-elimination tournaments, the winners advance to the next round while the losers go home. The two remaining teams play each other after both win their first matches. This process continues until only one team is left standing. In three-or-four-game finals, the winner is determined by which team can score more points based on how many games they won. In five-game first rounds and championship matches, the team that scores most points wins. In double-elimination groups, all remaining players play each other twice: once before the start of the season and again at the end. The team that wins more matches between these two rounds is the champion.