Rugby sevens also known as seven a side sevens or viis is a variant of rugby union in which teams are made up of seven players instead of the usual 15 with shorter matches artwork copyright push merchandisingt shirt design reads 7s rugby discriminating against fat boys since 1883our crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrunk jersey knit our womens t shirts are lighter weight 150g tees made with deluxe 30s soft style yarns for a soft feel