Notice: The size is set according to macbook If you order it for macbook, please follow above list to order.(Not Fit Old Macbook Pro 13 A1278, Not Old Macbook Pro 15 A1286) If your laptop is other brand, please measure the laptop size before place order, please also consider the thickness of your laptop. if your laptop is new thin version, a bag about 4cm bigger will fit, if you have old thick version laptop, then need bigger size bag. when measure the laptop size, please add the thickness size in. need laptop lenght+thickness smaller than the bag length,and laptop width + thickess smaller than the bag width. if laptop length+thickess or Width+thickess is bigger than the bag size, then can not fit. if there is any question, please contact us.