Launch image actual size in pixels

So, I wanted to use launch image in my game and then fade it out to my game scene, but I run into this problem with mismatch image sizes. What I do is I set the launch screen in the build settings, and then the first loaded scene will have the same image with the same size. Then, I load my next scene and fade out this logo image.

Launch screen => 1st scene with identical image => fade out to next scene.

My launch screen setting is:

• 190x190 pixels

• "image and background (constant size)"

• 100 points in size.

Now, when I run the game on my iPad, the actual size of the launch image is 200x200 pixels. I know this by taking screenshot from my iPad and check the size on Photoshop.

Does anyone know what's the formula/calculation for this? How come my 190x190 pixels launch image becomes 200x200 when run on an iPad? I need this to do the logo fade out animation....