This commission is from artist Nate Snareser. The phrase that comes to mind is... "clicky for biggy"
The Batmen and women of the DC Universe and beyond.
Robins from left to right: Helena Wayne, Jason Todd, Dick Grayson, Tom Wayne from Robin 3000, Stephanie Brown, Tim Drake, Carrie Kelly from Dark Knight Returns, Damian Wayne, and the Robin from DC One Million.
Batmen from left to right: Batman from the DC One Million crossover, Terry McGinnis from Batman Beyond, Jean-Paul Valley (Azrael), Batman Junior (possible future son of Bruce Wayne), Bruce Wayne, Brane Taylor (Batman of the 31st Century), Sir William the Bat Knight (from DC's Tangent comics events), Batsman (Batman of the 46th Century) and Damian Wayne.
Bat-Ladies from left to right: Bat-Girl (Bette Kane), Kingdom Come Batwoman, Misfit, Batgirl (Barbara Gordon), Batgirl (Stephanie Brown), Batgirl (Cassandra Cain), Batwoman (Kate Kane), Batwoman (Kathy Kane) and Huntress (Helena Bertinelli).
Nate's deviantart account is here and he's also on Twitter.