Crochet Pet Hat with Horns: Fun Knitting Patterns for Pets

If you’ve ever scrolled through social media and stopped dead in your tracks at a photo of a golden retriever wearing a tiny dragon hat or a cat glaring at the camera with devil horns perched on its head, you already understand the pure joy that comes from dressing up a pet. Crochet pet hats with horns are one of the most delightful and creative projects you can tackle as a yarn crafter, and the best part is that even beginner crocheters can make them. Whether you want a unicorn horn for your bunny, Viking horns for your husky, or devil horns for your mysteriously evil-looking cat, this guide has everything you need to get started, improve your skills, and create hats that will have everyone asking where you got them.

Why Crochet Pet Hats with Horns Are So Popular Right Now

Pet accessories have exploded in popularity over the last several years, and crocheted hats sit right at the intersection of handmade craftsmanship and internet-worthy pet content. There’s something irresistible about a small, perfectly crafted hat with a wiggly horn sitting on top of a dog’s head. These projects go viral for a reason — they combine the warm, tactile appeal of handmade goods with the universal love people have for their animals.

Beyond the social media angle, crochet pet hats with horns make incredible gifts. A custom-made unicorn hat for a friend’s Pomeranian or a triceratops hat for a neighbor’s guinea pig shows a level of care and creativity that store-bought items simply cannot match. They’re also genuinely fun to make. Unlike large blankets or garments that can drag on for weeks, most pet hats are small enough to finish in a single afternoon, which makes them perfect for crafters who love quick, satisfying projects.

There’s also a practical creative benefit: pet hats give you a low-stakes way to practice new crochet techniques. Working in the round, increasing and decreasing stitches, creating three-dimensional shapes, and changing colors — all of these skills show up in horn hat patterns, and since the projects are small, any mistakes are easy to fix and don’t waste much yarn.

Understanding the Basics Before You Start

Before diving into specific patterns, it helps to understand a few foundational concepts that will come up again and again when you’re making crochet pet hats with horns.

Working in the round is the primary technique used for hat construction. Rather than working back and forth in rows, you’ll join each round to create a seamless tube or dome shape. Most pet hat patterns start at the top of the hat (or the base of the horn) and work downward, increasing stitches as you go to create the bell shape that sits over your pet’s head and ears.

Single crochet (sc), half double crochet (hdc), and double crochet (dc) are the stitches you’ll encounter most often. Single crochet creates a tight, sturdy fabric that holds its shape well, which is important for hats that need to stay on a wiggly animal. Half double and double crochet create a slightly looser, more drapey fabric that works beautifully for decorative elements like ruffs or flower embellishments.

Magic rings are used to start most horn shapes because they allow you to close the tip of the horn tightly so there’s no hole at the top. If you haven’t mastered the magic ring yet, this is a great excuse to learn it — it’s one of those techniques that seems fiddly at first but becomes second nature very quickly.

Gauge matters more than many beginners expect, especially for pet hats. A hat that’s slightly too tight can be uncomfortable and may not fit over your pet’s ears, while one that’s too loose will fall off immediately. Always make a small gauge swatch before starting, and measure the circumference of your pet’s head before you begin the pattern.

Choosing the Right Yarn and Hook

The materials you choose will affect both how the finished hat looks and how comfortable it is for your pet. Since animals often groom themselves and may occasionally mouth at their accessories, choosing pet-safe, non-toxic yarn is essential.

Acrylic yarn is the most popular choice for pet hats because it’s durable, machine washable, comes in an enormous range of colors, and is generally very affordable. Lion Brand Vanna’s Choice and Red Heart Super Saver are two widely available options that crochet beautifully and hold up to washing. For hats with horns, acrylic works particularly well because it gives the horn enough body to stand upright without additional stiffening.

Cotton yarn is another excellent option, particularly for pets that have sensitive skin or for owners who prefer natural fibers. Cotton is breathable, hypoallergenic, and very easy to wash. The slight stiffness of cotton makes it great for holding horn shapes. The tradeoff is that cotton is heavier than acrylic and has less stretch, so you need to measure carefully.

Chunky or bulky yarn creates hats that work up very quickly and have a fun, fluffy aesthetic. If you’re making a hat for a larger dog and want something that looks substantial and cozy rather than delicate, a bulky weight yarn paired with a larger hook (around 6mm to 8mm) is a fantastic choice.

For most standard pet hat patterns, a worsted weight yarn (weight 4) paired with a 5mm or 5.5mm hook is the sweet spot. This combination creates a fabric that’s sturdy enough to hold its shape, soft enough to be comfortable, and works up at a pace that lets you finish a hat in a single sitting.

For stuffing the horns, polyester fiberfill is the standard choice. It’s lightweight, washable, and gives horns a firm, perky shape. If you don’t have fiberfill on hand, you can also use rolled-up pieces of yarn or pipe cleaners (for a poseable horn) wrapped in a thin layer of fiberfill.

How to Measure Your Pet for the Perfect Fit

One of the most common frustrations new crafters face when making pet hats is getting the sizing wrong. Since you can’t exactly ask your cat to try on a hat mid-project, taking accurate measurements before you start is the key to success.

You’ll need two measurements: the circumference of your pet’s head and the length from the top of the head down to just above the ears. Use a soft measuring tape and have a helper hold your pet still if needed, or distract them with a treat.

For reference, here are some general size guidelines that work for most breeds within each category, though individual pets vary significantly:

Cats and small rabbits typically have a head circumference of about 9 to 11 inches. Small dogs like Chihuahuas, Yorkies, and similar breeds usually measure between 10 and 13 inches. Medium dogs like Beagles and Cocker Spaniels tend to fall between 13 and 17 inches. Large breeds like Labrador Retrievers and Border Collies usually measure 17 to 22 inches, and giant breeds like Great Danes and Saint Bernards can exceed 22 inches.

These numbers give you a starting point, but always compare your pet’s measurements against the finished measurements listed in whatever pattern you’re using, and adjust the number of starting chains or rounds accordingly.

A Basic Crochet Pet Hat Pattern (The Foundation)

Before adding horns, you need a solid hat base. Here is a simple, adaptable pattern that works for small to medium pets. Once you master this shape, you can build any horn style on top of it.

Materials: Worsted weight yarn in your main color, 5mm crochet hook, yarn needle, scissors.

Abbreviations: ch = chain, sc = single crochet, sl st = slip stitch, inc = increase (2 sc in one stitch), MR = magic ring.

Pattern: Start with a magic ring. Round 1: Work 6 sc into the magic ring, pull tight, and join with a slip stitch. Round 2: Work 2 sc into each stitch around for 12 total stitches. Join. Round 3: Alternate 1 sc and 1 increase around for 18 total. Join. Round 4: Work 1 sc, 1 sc, then 1 increase, repeating around for 24 total. Join. Round 5: Work 3 sc then 1 increase, repeating around for 30 total. Join.

Continue in this pattern, adding one more plain sc between each increase in each round, until the hat reaches the diameter you need for your pet. Once the hat is the right width, stop increasing and work even rounds (no increases or decreases) until the hat is deep enough to cover from the top of your pet’s head to just above the ears.

Finish with a slip stitch border or a decorative edge of your choice. Fasten off and weave in your ends.

Making the Horns: Three Popular Styles

This is where the fun really begins. Horns come in many shapes and sizes, and each one gives the finished hat a completely different personality.

The Classic Unicorn Horn is a single, spiraling cone placed at the center top of the hat. To make it, start with a magic ring and work 6 sc into the ring. In the next round, work 1 sc, 1 increase, repeating around. Continue working rounds, adding one additional sc between increases every few rounds to create a gradual taper. The slower you increase, the longer and more elegant the horn will be. For a shorter, stubbier horn, increase every other round. For a long, majestic unicorn horn, increase only every third or fourth round and continue until you have a cone about 3 to 4 inches long. Stuff firmly with fiberfill as you go, then sew it to the top center of the hat. Wrapping the horn loosely with a strand of contrasting yarn in a spiral pattern after assembly creates the classic twisted unicorn look.

Devil Horns or Viking Horns require making two identical curved shapes rather than one central cone. Work each horn exactly as you would a unicorn horn, but stop when the horn is smaller — about 1.5 to 2 inches for devil horns and 2 to 3 inches for Viking horns. To make them curve outward slightly, insert a small piece of pipe cleaner into each horn before sewing them closed and attaching them to the hat. Position devil horns at about the 10 o’clock and 2 o’clock positions on the hat, and Viking horns slightly lower and further out to the sides for an authentic look.

Dinosaur or Dragon Spikes involve creating a row of several small horns in graduated sizes and sewing them along the center top of the hat from front to back. Start with a tiny spike (work just 3 or 4 rounds before closing), then make progressively larger ones, and then graduate back down to tiny again. This gives the hat a dramatic, prehistoric ridge that works beautifully for dragon, dinosaur, or general fantasy creature themes.

Adding Color, Embellishments, and Personality

A crochet pet hat with horns is a canvas, and the embellishments you choose are what transform it from a simple accessory into something truly memorable.

For unicorn hats, adding a crocheted flower or a cluster of small flowers at the base of the horn gives it a whimsical, fairytale quality. You can also attach a small crocheted rainbow or a cluster of stars near the brim. Choosing yarn in pastel rainbow colors — soft pink, lavender, mint, and yellow — immediately signals “magical creature” without needing any additional embellishment.

For dragon or dinosaur hats, working the hat body in a deep green, teal, or charcoal creates an instantly reptilian feel. Making the spikes in a contrasting color — bright orange or yellow — suggests fire-breathing. Adding small crocheted scales to the sides of the hat (created by working small shell stitches in alternating rows) adds an extra layer of detail that makes the finished piece look incredibly polished.

For devil or Halloween-themed hats, bold red yarn for the horns against a black hat body is a classic combination that photographs beautifully. A small crocheted lightning bolt, a tiny pitchfork made from wire wrapped in yarn, or a crocheted flame shape attached to the brim can push the design from cute to spectacularly theatrical.

Googly eyes sewn onto the front of the hat are a simple touch that add enormous charm, particularly for creature-themed hats. You can also embroider eyes directly onto the hat using yarn and a tapestry needle, which has the advantage of being completely secure and safe for pets who might be tempted to bat at attachments.

Tips for Getting Your Pet to Wear the Hat

The finest crochet hat in the world is useless if your pet refuses to wear it, and getting a pet to tolerate a hat requires patience, positive reinforcement, and strategic timing.

Start by simply placing the hat near your pet and letting them sniff it thoroughly. Then practice touching the hat to the top of their head without putting it on. Reward generously at every step. Gradually work up to putting the hat on for just a few seconds at a time, always following with immediate praise and treats. Over several short sessions, most pets become at least tolerant of wearing a hat briefly, which is all you really need for a few quick photos.

Fit matters enormously for tolerance. A hat that slides down over the eyes or presses uncomfortably on the ears will be immediately rejected. Make sure your hat sits high enough that it doesn’t block your pet’s vision and doesn’t compress the ears. Adding two small ties that fasten loosely under the chin helps keep the hat positioned without constricting.

Never force a pet to wear a hat for extended periods, and always watch for signs of stress. A brief photo session with lots of rewards is wonderful enrichment for a pet who tolerates accessories; prolonged wearing is not necessary and not kind.

Troubleshooting Common Problems

If your horns are flopping over rather than standing upright, the most likely culprits are insufficient stuffing or yarn that’s too soft. Pack the fiberfill as firmly as possible, and if the horn still won’t stand, insert a pipe cleaner or a short length of stiff wire wrapped in tape for safety before sewing the horn shut.

If the hat is too loose and keeps sliding, add a round or two fewer when you reach the brim portion, or add a ribbed edge by alternating front post and back post single crochets in the final round, which creates a band with more grip.

If the hat is too tight to fit over the ears, you likely need to add more increase rounds to the base section. Go up by 6 stitches per adjustment round until the circumference matches your measurement.

If your rounds are spiraling or looking uneven, make sure you’re placing a stitch marker in the first stitch of each round and moving it up as you go. This is one of the simplest techniques that makes a dramatic difference in the neatness of finished rounds.

Sharing Your Creations

Once you’ve finished your first crochet pet hat with horns and photographed your incredibly patient (or hilariously indignant) pet wearing it, share it. Post it in crochet communities on Reddit, in Facebook crafting groups, on Instagram with relevant hashtags, or on Pinterest where pattern-based content performs exceptionally well. Other crafters love seeing finished projects for inspiration, and pet photos are perennially beloved content that tends to attract warm, enthusiastic responses.

If you find yourself making these hats regularly, consider selling your patterns on platforms like Ravelry or Etsy, or selling finished hats to pet owners who love the look but don’t crochet. Custom pet hat orders are genuinely popular, and being able to make something unique for a specific pet — the right size, the right colors, maybe a dragon hat that matches the owner’s favorite fantasy franchise — is a skill that people appreciate and are happy to pay for.

Crochet pet hats with horns are one of those projects that somehow manage to be simultaneously practical (they use up small amounts of yarn, work up quickly, and make great gifts), creatively satisfying (there’s real skill involved in shaping a three-dimensional object), and joyful in a way that few other crafts achieve. Every time you pull that finished hat gently onto your pet’s head and your phone camera captures a moment of resigned dignity or unbothered confusion, you’ve made something worth sharing. Get your hook, pick your colors, and start creating.