Step by Step Tutorial for Making a Slit in a Dress or Long Skirt ehow Front Cut Out Long Mermaid Prom Dress: Atria 6869H Kelly XSmall HOW TO SEW A FRONT SLIT on a dress skirt with lining neatly . Luuvis Women Gorgeous Blue Mermaid V Neck Long Lace Prom Dress With Slit Portia and Scarlett PS24293 Applique High Slit Prom Dress Couture Candy How to add a slit where you don't have a seam. I had made a dress but wanted to add a slit to it once it was done, so didn't have a