Here's a helpful tip for anyone who might want to match up font sizes between the Paperwhite and K4 or K3.
There is a 2% difference in sizes.
So you enlarge a font at 12% for the PW.
You would enlarger the font for 10% on the K4 or K3.
There is also a difference in line spacing.
Medium line spacing on the PW is Small line spacing on the K4 or K3.
So Large on the PW would be Medium on the K4 or K3.
Size 4 on the K4 or K3 is Size 5 on the PW.
Size 2 on the K4 or K3 is Size 3 on the PW.
(You get the idea)
This only applies to Custom fonts due to the Kindle using a style sheet or some type of settings for default fonts.
So it's possible to get the font sizes to match on both Kindles even if they are different size settings, they are identical this way.
