Quick & EasyNo. 1361 · The 2026 edition
Adorable DIY Jellyfish Costume
Transform into a glowing jellyfish with this cute DIY costume featuring a bubble umbrella and LED lights.
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This adorable jellyfish costume uses a bubble umbrella as the base, covered with sheer fabric and LED lights for a magical glow. The dress is made from knit velour with ruffled sleeves and diagonal sheer panels, while ribbons and boas create flowing tentacles. Perfect for Halloween or costume parties, it's a whimsical and eye-catching outfit.
You'll need
Directions
- Make a pattern by tracing a simple knit dress, add seam allowance, and angle the bottom to one side. Ensure the fabric's stretch goes side to side.
- Cut two rectangles measuring 3 by 28 inches for the ruffled sleeves.
- For the diagonal sheer piece on the front, lay a yard of sheer fabric over the dress edge at an angle and cut to fit.
- Cut 1.5 yards of coordinating sheer into strips about 11 inches wide to create 5 ruffles—three for the front and two for the back.
- Fold the raw edges of the neckline under and sew using a stretch stitch on both the front and back pieces.
- Sew the shoulder seams together with the right sides of the dress facing each other.
- Gather each sleeve piece and adjust the gathers to fit the armhole openings.
- Pin and sew the sleeves to the armholes, then repeat for the other side.
- Attach the large sheer piece to the front and back of the dress at an angle using a stretch stitch.
- Gather the ruffle pieces by folding them in half and sewing a gathering stitch along the top edge.
- Adjust the gathers to match the top of the dress where the sheer piece is attached, then pin and sew to attach.
- Sew the top ruffle through both the sheer and bottom dress layer; attach the remaining ruffles only to the top sheer fabric.
- Sew the side seams, including through the sleeves, with the right sides of the dress together.
- Drape 1.5 yards of sheer fabric over the top of the bubble umbrella and tie it to the top with ribbon.
- Trim the sheer fabric around the edges of the umbrella with scissors.
- Tie boas to each end tip of the umbrella using small ribbon or yarn.
- Tie pieces of ribbon about a yard long to each tip of the umbrella to act as tentacles.
- Wind LED lights inside the umbrella for a glowing effect.
More photos
Photos hosted by makeit-loveit.com.