We’ve long known what RIM’s (RIMM) first BlackBerry 10 smartphone will look like, but now we can get a better idea of its overall size thanks to new pictures published by Business Insider. An unnamed source sent Business Insider pictures of the BlackBerry Z10 placed side-by-side with the iPhone 4S to show that the Z10 has a significantly larger display and a slightly thicker casing than Apple’s (AAPL) classic smartphone model. Business Insider’s source said he or she was generally impressed with the Z10 so far, including the back cover that “feels rubbery and snaps on sort of like the back cover on Samsung’s (005930Galaxy S III” and the display that “looks great.” The source also said RIM’s new Web browser is as fast as a desktop browser, BlackBerry 10 supports separate work and personal profiles, and it includes built-in Evernote integration. A second leaked picture of the Z10 next to the iPhone 4S is posted below.

Prior to joining BGR as News Editor, Brad Reed spent five years covering the wireless industry for Network World. His first smartphone was a BlackBerry but he has since become a loyal Android user.