I like red lines on the borders and light gray on the inside. I find it very hard to cut when it is all very black. I loose the blade in the black and it drives me nuts so I make them colored the way I prefer. Hopefully, you will like it this way also.
If you want to resize it you can use GIMP or any other such tool that will resize images.
Anyway here is the pattern if you like it please leave a comment and let me know.