USBands

USBands (formally United States Scholastic Band Association or USSBA) was formed in the Fall of 1988 to provide high school band programs with a competitive circuit featuring top judges from across the continent and a venue for the US Scholastic Band Championship. It is currently operated by Youth Education in the Arts.
USBands membership consists of over 700 participating high school marching bands. Annually, bands are offered over 150 festival opportunities and invitations to compete at major Regional Championships and the US Scholastic Band Championship. Bands are classified by size, with Group 1 being the smallest and Group 6 being the largest, and by skill level. The A Class is for inexperienced bands, new bands, and bands that have recently moved to a larger size group. The Open class for established programs. This results in twelve groups ranging from Group I A to Group VI Open, performing and competing with other bands of like size and talent. USBands has started to support competitive indoor events as well as cooperative fundraising opportunities. In the winter of 2012, USSBA changed their name to USBands.
Classifications.
The USBands allows their bands to classify themselves into three groups in: 
Group Size.
Bands are grouped by the number of members on the field. This count includes playing members, auxiliary, and command personnel drum majors. Group sizes are as follows (new class size breaks used for the 2016 to 2019 seasons): 
For 2020, USBands created a different group sizing and eliminated "Open Class" as part of it's "v-USBands" virtual adjudication platform . While individual musicians and guard performers along with small ensembles were adjudicated, group Sizes for Marching Bands were as follows:
Bands smaller then 26 members could opt to be adjudicated with Division 1 or as an "Ensemble".
For 2021, "Open" Class has been restored for all Competitions in Texas & beginning with Competitions on September 25 Nationally. Group sizes have been changed as follows:
Group VI has been eliminated