Crystals Lilac Sequin Sexy Plunging Neck Cut Out Slit Mermaid Dress Red Cut Glass Mirror One Shoulder Prom Dress with Slit Modsele Sweetheart Cut Mermaid Black Long Prom Dress with Slit PSK533 Pgmdress How to add a slit where you dont have a seam. I had made a dress but wanted to add a slit to it once it was done, so didnt have a seam where I could add one easily, so this is the method I used!, Andrea Cutout Slit Mermaid Sequin Formal Dress Windsor