I don't have any before pictures, but all I did was measure how much to cut off for them to end below the knee. I left the edges raw since they are a cotton knit. Obviously they will never be a fashion statement. However, they are now more usable around the house than they were before, and I smile when I see the personalized "K", LOL!
Check out my tutorial on how I do reverse applique: Reverse Applique Tutorial
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