High Quality Content by WIKIPEDIA articles! Minimumweight (also referred to as strawweight or mini flyweight) is a weight class division in combat sports. The most notable of which is in professional boxing where boxers may weigh no more than 105 pounds (48 kg). This is a relatively new weight category for professionals, first inaugurated by the major boxing sanctioning bodies between 1987 and 1990. In most sports that use it, minimumweight is intended to be the smallest amount an athlete can weigh to compete.