I bought a pair of back seam cuban heel tights from amazon. Being almost 6 feet tall, I was really hoping they would be tall enough. They weren't. Either I wouldn't wear them at all or I could do an experiment. If they got ruined, oh well. I decided to turn them in to thigh highs. I was a little nervous at first because they are so delicate. This worked out perfect for me, I'm not sure if some styles it wont. Just be careful and take your time. It worked out great though! I actually have a lot of tights that will now turn into thigh highs.
What you will need:
Clear nail polish
A sock ball
Step One: Set out our stockings or tights on the floor so they are nice and flat
Step Two: Cut them at the length you want them. I cut theses just above the back seam, just in case, I didn't want any unraveling. I also cut them at the longest possible point.
Step Three: Stuff a rolled up sock in the stocking. Its best to you a different color so you can see the edge of the stocking.
Step Four: Using any clear nail polish coat the ends fully. Do this all the way a round. I did two coats, just in case I missed a spot. This is what helps the stocking from getting a run in it. Let fully dry!
Step Five: Using a zig-zag stitch and I used a #4 on my stitch length dial. Stretch the stocking and sew all around the stocking. You stretch it, that way it wont be sew too tight of a stitch and then it wont fit around your thigh.
Step Six: Attach them to a garter belt and look adorable!