The girls chose to be mermaids this year for Halloween. Specifically, “Fairy Tale Mermaids”. I aimed for a simple skirt with a tail that they could easy to walk in. Here’s how I made their mermaid skirts!
DIY Mermaid Costume for Kids: Supplies
- Use shiny fabrics to enhance the allure of your new mermaid costume. stretchy fabric (like sequin fabric or mermaid scales print), about 1.5 yards
- Cotton fabric, about 1/2 yard, is perfect for crafting your DIY Halloween costumes.
- Batting
- 1 inch elastic for waistband
- Decorative elastic (such as foldover or Ruffle like a mermaid to add a whimsical touch to your design.d) for the wrist band
- Measuring tape
- Rotary cutter, straight edge, ruler
- Coordinating thread
- Sewing machine (or fabric glue for a no-sew option)
- Pins to pin fabric
- Washable pen
- Glitter paint, paint brushes
Creating the Mermaid Skirt
Measure your kiddo at the waist and hip. Also, measure from the waist to ankle, waist to knee, and knee to ankle. Add 3 inches to the waist measurement (width), and 2 inches to the waist to ankle measurement (length). Cut 1 rectangle out of the stretch fabric. Then, double the length and cut 2 rectangles out of the stretch fabric for the back.
The back of the skirt (i.e. the mermaid tail) is lined so that’s why you need to cut 2. The reason it’s lined is because the tail is carried on the wrist, so the underside of the fabric can be seen when it’s lifted. We’re going to cut the back of the skirt at an angle on both sides to resemble a tail tapering down to the fin.
Sew both pieces together along the sides, leaving the top edge and bottom edge open. Use a zig zag stitch and 1/2 inch seam allowance. Turn right side out and press. Then, lay the front skirt piece on top of this back piece that you just sewed together, creating layers that flow like a mermaid’s tail. Sew the side seams to secure the pieces together, making sure it fits like a mermaid costume. Next, we’re going to cut a triangle in the front so it’s easy to walk, ensuring it flows like a mermaid’s tail. Measure from the top edge of the front to the knee again but this time on the front skirt. Using scissors, cut at an angle from the bottom corner of the front skirt up to the center knee mark.
Making the Mermaid Tail Fin
Now it’s time to sew the tail fin. Download and print the Mermaid Tail Fin Template below on cardstock.
Cut 2 pieces of the cotton fabric on fold. Cut 1 piece of batting on fold. Pin the 2 cotton pieces together and sew, leaving an opening where shown. This will be a turning hole as well as where the tail fin will fit over the skirt tail. Turn the tail fin right side out, cliping the inward curve at the bottom. Insert the batting into the cotton pieces like a pillow.
Next, quilt the tail fin by drawing some wavy lines along each side of the tail to create a scale effect. Then, stitch through the batting along the lines.
Fold the turning hem seam inward and press. Insert the skirt tail into the opening, plus the wrist elastic on one side, folded in half. Stitch the opening closed, making sure you catch all of the skirt tail as well as the wrist elastic. Last thing is to sew the casing for the elastic waistband and inserting the 1-inch elastic, and you’re all done sewing.
Adding Sparkle and Accessories
If desired, paint the tails with glitter paint for extra Add a sparkle effect to your diy mermaid costume for Halloween to make it truly eye-catching.. They wore the skirts over leotards and leggingThe wristband allows them to walk without the tails dragging, and they don’t have to hold up the tail fin…it just flops over but you can tell it’s a mermaid’s tail still. This makes for a fantastic Halloween costume idea that stands out at any party. comfy costume idea.
Then I used $1 crowns and painted some sea shells with glitter paint, and hot glued the shells to them to make mermaid crowns. Finally, I made some sparkly necklaces with a shell and starfish pendant. You could also create starfish hair clips or add a rainbow wig to complete the Ariel look.
My mermaid skirts are far from perfect and part of me wishes they were fancier with more sequins. But the girls love them, which is the most important thing for Halloween night.
Conclusion
We hope you enjoyed reading the post. This DIY Mermaid Costume for Kids is a simple and creative idea that your kids would love to try out! Once they put on the costume, their imagination will start running wild and they might even convince you to dress up as a mermaid too! It is my dream to create a beautiful diy mermaid costume for Halloween. favorite diy project for a crafty mom.
FAQs
Q: What are some easy DIY mermaid costume for kids ideas for Halloween?
A: For an easy DIY mermaid costume for kids you can start with a sequin or glittery skirt or a wrap around tulle tail made from layered tulle and elastic — no-sew options work great. Add a seashell top or a faux-seashell necklace, glue on some craft gems, and finish with a headband of braided ribbon and faux pearls for a quick DIY mermaid halloween costume that’s perfect for trick-or-treating.
Q: How do I make a no-sew mermaid dress or tail?
A: A no-sew mermaid dress can be made by cutting a rectangle of wrap around fabric or tulle, tying the ends with ribbon or elastic to form a snug waist, and pin in place embellishments like faux sequins or shells. For a tail, use a long wrap around skirt and gather the bottom with elastic to create a fin shape — this easy diy method keeps things simple for crafters who prefer no sewing.
Q: Can I create a handmade seashell top without sewing?
A: Yes. Use a plain camisole as a base and hot-glue or safety-pin faux seashells onto the front, or craft seashell shapes from felt and attach them with fabric glue. For a child-friendly option, use a swimsuit top and the same glue method so it’s comfortable for trick-or-treating and washes easily.
Q: What materials are best for a comfortable mermaid costume tutorial for kids?
A: Choose soft, breathable fabrics like stretch jersey for the base, tulle for layers, and lightweight faux sequins or fabric paint for shimmer. Use elastic waistbands and consider a wrap-around tail for quick adjustments, making it an ideal no-sew mermaid costume. These materials keep the costume wearable for long periods, and many are compatible with easy DIY and no-sew techniques described in step-by-step mermaid costume tutorials, perfect for crafting a new mermaid look.
Q: How can I make a secure mermaid fin that stays on while a child plays?
A: Reinforce the fin with interfacing or a lightweight plastic insert and attach it to a skirt with a wide elastic waistband. Use safety pins or a few hand stitches in stress points if possible, or pin in place with fabric-friendly safety pins for a no-sew approach. A wrap around design distributes pressure and helps the fin stay put during active play like trick-or-treating.
