Do you want to try out the paint you mixed before you put it on your shoe to check if it is the right color?
This is perfect before you go and put paint somewhere you may not be able to get it off. Test out your paint mixes with a cheap and effective leather strip. The top can be used for leather application while the back can be used for suede applications.
Strips come with at least 4 inches of paint room and are an inch wide.