C-fold the basic fold that most women use. Once inserted give it a moment to spring into position (don’t worry, it always does!)
Punch Down Fold the fold most popular with younger cup users. It makes the cup smaller to insert, you just might need to give it an extra nudge and check that it has opened properly.
7 Fold the simple fold that’s maybe easier to insert and a good option if the other methods don’t seem to suit you as much.