This model is BIG at 295mm x 155mm so it will only print on large format printers like the Creality CR-10. You can scale it down to fit your build plate if you wish. The idea behind making this large palette came when I was cutting down paper towels for my old, smaller wet palette. I thought "wouldn't it be nice if the palette was half the size of a paper towel?" So here it is. It should provide you with plenty of space for mixing colors and it is conveniently large enough for most paper towels (kitchen paper) to be folded over.
I like to use neodymium magnets to keep the parchment paper flat.
I didn't print it, but I included the design and quote in case you wanted a little flair on the lid.