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DIY Felt Seashell Brooches – Free & Easy Sewing Pattern

July 16, 2025 by Laura

Last Updated on August 13, 2026

These simple felt seashell brooches are the perfect summer accessory. Giving beachy, mermaid vibes and done up in cheerful colours, making them is a great way to spend a hot afternoon hiding from the sun!

Easy DIY felt seashells brooches with free printable pattern. Learn how to sew some adorable felt seashell badges in an afternoon. These magical felt seashells are giving serious mermaid vibes! Beginner friendly sewing tutorial for nautical inspired shell brooches.

This post contains affiliate links. Read more.

The ocean is a friend of mine, I’m a serious beach girlie. Not to sit and lounge, but to walk in the lapping waves, searching for treasures and breathing deep the salty air.

So I love designing anything nautical. You’ll notice the shop has a number of ocean-y patterns like these mermaids and these critters.

I’ve had seashells on my list of designs to make for over a year, I just couldn’t decide what I wanted them to be. I finally settled on this scalloped-edge brooch design and I love them!

These felt seashell brooches would be so charming adorning a backpack, a beach bag, a camp t-shirt or whatever else you can dream up!

You could totally create a “crafternoon” with the tweens in your life and set out all the supplies for making these badges. I know it would be a hit!

And if you’re looking for even more felt brooch design ideas, I just finished this round-up post of 18 free patterns!

Materials

To make ONE felt brooch in either shell style you will need:

PDF Pattern – Find it at the bottom of the post, no sign-up required
Backing felt – 3.5″ x 4.5″
Cream felt – 2″ x 3″
Main shell colour – 2″ x 2.5″
Darker secondary shell colour – 1″ x 1.25″
1″ Brooch pin or safety pin
Matching embroidery threads (except for the backing colour)
Scalloped Scissors 5mm (optional)
Embroidery Scissors
Pins & Sewing Needle
Hot glue gun like this Surebonder
Marking pen like this Frixion
Heat source

All the felt colours I used are 100% wool and are available in this shop.

I used Wood Violet, Berry, Robin’s Egg, and White for the conch.
I used Papaya, Salmon, Sage, and White for the scallop.

How to Make a DIY Felt Seashell Brooch

I’m starting here with the conch shell design.

Step 1: Cut out the pieces according to the instructions on the pdf pattern. You’ll cut out 2 shell pieces, one smaller oval in cream, one smaller oval in the backing colour, and one larger oval in the backing colour.

Next, take the scalloped scissors and trim around the larger oval just a tiny bit to get beautiful scalloping all around. (This is optional, you can just leave the edge as-is if you prefer.)

Start by cutting out all the felt pieces you will need to make a seashell brooch.

Step 2: Center the main shell piece on the cream oval and stitch it in place all around the perimeter with a single strand of matching thread and a small backstitch.

Use a heat erasable pen to mark the 3 embroidery lines across the shell as shown.

Stitch these lines with a single strand of matching thread and a tiny backstitch.

Use a heat source, like an iron or a mini hair straightener to remove the embroidery markings.

How to mark embroidery stitch lines with a heat erasable pen on a felt seashell.

Step 3: Switch to a single strand of cream thread and go back over the embroidery lines, using the same stitch holes to double up the stitches. This adds a little depth to the shell. Run the cream stitches beneath the original (purple) stitches.

Use a single strand of matching thread to attach the darker shell piece in place with a tiny backstitch.

Easy embroidered felt seashell brooch pin. How to embroider on felt.

Step 4: Center the cream oval on top of the scalloped oval and stitch it in place with a single strand of matching thread and a tiny blanket stitch.

Start layering the felt brooch pieces.

Step 5: Cut 2 small slits in the remaining oval piece and fit the ends of the metal brooch pin through. (This can also be done with a safely pin.) Add a small amount of hot glue to the back to hold the pin in place.

Add a brooch pin to the backing piece.

Step 6: Center the oval on the back of the finished frontside and use hot glue to attach it in place.

How to finish the back of a felt seashell brooch.

Easy Felt Seashell Pin Sewing Tutorial

The scallop shell design has a fairly similar assembly process, but we’ll go through it anyway.

Step 1: Trim around the larger backing circle as close to the edge as possible with the scalloped scissors.

Using scalloped edged scissors on felt.

Step 2: Center the darker shell piece towards the bottom of the cream circle and stitch it in place with a single strand of matching thread and a small backstitch.

How to make a scallop shell felt brooch pin.

Step 3: Layer the larger shell piece on top of the darker one, so that the bottom ‘point’ of the shell lays just barely beyond the edge of the darker piece. Stitch it in place all around the perimeter with a single strand of matching thread and a tiny backstitch.

Draw embroidery lines using a heat erasable pen extending down from each ‘dip’ along the outside of the shell into the point at the bottom. 

Embroidering the lines on a scallop shell felt brooch.

Step 4: Embroider each line with a single strand of matching thread and a small backstitch.

Remove the markings with an iron or mini hair straightener.

Go back over the embroidered lines with a single strand of cream coloured thread, using the same stitch holes and keeping the cream stitches to the left of the original (coral) stitches.

Embroider the lines on the scallop shell brooch DIY.

Step 5: Center the cream circle on top of the scalloped edge circle and attach it in place with a single strand of matching thread and a tiny blanket stitch.

How to sew an easy seashell badge pin.

Step 6: Add the metal brooch pin and finish the back of the scallop seashell brooch in the same way as the conch design pictured above.

Free DIY Felt Seashell Badges

Now then, aren’t these just darling?!

Learn how to make these beautiful felt seashell brooches with free pattern and tutorial!

Easy DIY felt seashell badge tutorial and free sewing pattern.

I’m actually so excited I get to showcase some of my best seaglass finds in these pics! The lavenders and seafoam greens are my favourites and rare for me to find! I beach-comb whenever I’m close to the ocean. 🙂

Free felt craft pattern and instructions for adorable seashell brooches.

Quick and easy felt craft project. Free pdf pattern for two seashell designs. 

The cutest felt seashell brooches to bring out your inner mermaid!

Mermaid vibes are strong with these beautiful felt seashell brooches!

Make charming felt seashell brooch pins with this easy to follow sewing tutorial and free pdf pattern!

I hope you’re as obsessed with these cutiepie felt seashell brooches as I am!

As promised, here’s the free printable pdf pattern. Just click to download. No sign-up required for this design. But if you want to tag me in pics of your creations, I’d be thrilled!

Happy seashell crafting!

xo

Filed Under: Crafts & DIYs, Felt Crafts, Sewing & Embroidery Tagged With: diy felt brooch, easy felt brooch pattern, felt seashell diy, free felt brooch pattern

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Hey there, I’m Laura!

I’m a busy work at home mom and I have a passion for crafting with wool felt! I help other creatives live their best crafty life, whether that’s with felt patterns, fun DIY projects, holiday ideas, or running an online shop. Read More…

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