Before I sewed the legs up, I marked where the knees were. I placed a rectangle of fabric on the inside of the knees and started to stud up the leggings, hoping the second piece of fabric would give it stability. Then I sewed the leggings up as you normally would.
Unfortunately, it's one of those 'back to the drawing board' DIYs. The fabric stretches, obviously, making the studs fall out of their holes. I'm actually thinking about adding a dot of glue onto the prong of each stud and gluing them to the inside of the leggings? Any other suggestions? They're really cute, but I made these in October last year and well... I don't want to lose my studs yo!