This is an item of stationery (paper or writing goods), or other small merchandise such as good-luck charms, mascot straps, et cetera.
Here's a nice illustration of the Nerv logo with Japanese and German text printed on a magnetic ribbon. Part of Hobby Japan's Magnetic Collection series, this item can attach itself to any flat metal surface you place it on and can be easily removed. Great for decorating your desk, fridge, or even your car or motorcycle! It had been specially laminated for outdoor use.