The Surface Pro 3 (with docked Type Cover 3) fits exactly in this super neoprene case (size 295 x 215 mm, 11.6 / 12.2 inches)! It only remains space to put the pen on top of the surface and close the zipper (which I think is perfect). The thickness is also good (about just over 2 cm Surface Type Cover +). Can fall down to perhaps harder materials (Hard Case EVA, leather, etc.) appropriate, but I did anyway before ;-), also the neoprene will dampen somewhat. The (too big for me something) zipper "metal bracket" I've replaced by another small bag (such a thing as sports equipment - elastic strap) - now this is perfect light and flexible. Everything worked great - I am really happy! So again like always.