Create your own show-stopping outfit with this Keyhole Mini Dress with Open Back PDF Sewing Pattern – perfect for raves, cosplay, exotic dancewear, clubbing, and costume parties. This sultry halter dress sewing pattern features a high neckline, a flirty keyhole front, and a dramatic open back that demands attention.
The neckline fastens with a secure S-Hook closure, adding both style and functionality. Designed for stretch fabrics, this pattern hugs the body in all the right places for that ultimate cheeky mini dress vibe.
✅ Includes 4 sizes
✅ Perfect for stretch fabrics
✅ Great for rave outfits, pole fitness, clubwear, and DIY costumes
✅ Digital download – print at home and start sewing today
✅ Elastic foot recommended for smooth sewing
Whether you’re designing your next cosplay costume, festival outfit, or sexy DIY club dress, this pattern is made to turn heads.
🧵 Have questions? We’re here to help with any part of the sewing process!
- Includes sizes XS-L
- One coverage option, Keyhole dress with halter back
- Formatted to print on US letter (8.5 x 11)
- Test square in US 2 x 2 inch and Metric unit 5.08 cm
- Pattern is color coded per size so you can make YOUR custom size
What You Will Need
- 1 yard of 2 or 4 way stretch fabric 58”- 60” wide
- Matching Thread
- Regular Home Sewing Machine
- Cover Stitch Machine / zig-zag stitch on a regular sewing machine
Pattern Assembly
- Side Seams: With right sides together, sew the front piece (1) to the skirt back (2) at the side seams using a ¼” serger stitch.
- Elastic Edging – Front and Back: Using an elastic attachment, sew ¼” elastic around all edges and the keyhole opening of pieces (1) and (2), except for the bottom hem and the top edge of the keyhole.
- Elastic Edging – Back Piece (3): Attach ¼” elastic to both the top and bottom edges of the back piece (3) using an elastic attachment.
- Join Front and Back: Sew the front (1) to the back (3) at the sides using a ¼” seam allowance and a straight stitch. ✔ Be sure to align the top and bottom edges of piece (3) correctly. ✔ Reinforce the elastic by sewing back and forth or using a secure stitch. ✔ Trim any excess elastic so it’s flush with the fabric.
- Hem Edges: Fold the elastic under and hem using a cover stitch or zigzag stitch.
✔ Open up the elastic at the sides of piece (1) & (3) before stitching to reduce bulk. - Neck Strap Tube: Fold the neck strap piece (4) lengthwise, right sides together, and serge into a tube.
- Turn Tube: Use a string turner or safety pin to turn the tube right side out.
(Optional: Finish the seam edge with a cover stitch for a polished look.) - Attach Neck Strap: Find the center of the neck strap (4) and attach it to the top of the keyhole opening on the main piece (1) using a straight stitch or any stretch stitch.
- Add S-Hook – Right Side: Attach a ¾” S-Hook to the right side of the neck strap. Fold the fabric through the closed end of the S-Hook and secure with a straight stitch.
- Create Hook Loop – Left Side: On the left side of the neck strap, fold the end to create a loop for the hook to pass through. Secure the loop with a straight stitch.
Quickie Video: https://youtube.com/shorts/KwORAKNMxRA?feature=share
