How many meters should a four-year-old buy colorful dance ribbons in the square?

0.8 meters. The colorful dancing ribbon in the square is a kind of ribbon. Four-year-old children should buy a 0.8-meter square colored dance ribbon. The ribbon should not be too long, and it is better to dance shorter. The length of ribbon dance of kindergarten children is about 80 cm, and that of adults is between 2 and 4 meters.