Head coach Simon Amor said: "We've been fortunate enough to have six World Series tournaments in which to work the guys, and for them really to fight for these spots.
"What's been most pleasing has not only been our progress in terms of how we're looking to play and change our style of game, but also to get to this point half way through the year with pretty much everyone fit to pick from barring Tom Bowen.
"This has been great for the selection but has created a real challenge for me as a coach to pick a final 12."
England, who will be aiming to improve upon a fifth-place finish at Glasgow 2014, have been drawn in Pool B alongside Australia, Samoa and Jamaica.
England Rugby Sevens squad in full: Tom Mitchell (c), Dan Bibby, Phil Burgess, Alex Davis, Richard de Carpentier, Mike Ellery, Harry Glover, Ollie Lindsay-Hague, Ruaridh McConnochie, Dan Norton, James Rodwell, Ethan Waddleton, Charlie Hayter (reserve)