DIY Cat Bed from a Cardboard Box and T-Shirt

Cats have a mysterious affinity for cardboard boxes, don’t they? Leave an empty one on the floor, and chances are your feline friend will be investigating, sitting in, or napping inside it within minutes. They also adore soft, enclosed spaces where they feel safe and secure. Combine these two loves, and you get the perfect recipe for a DIY project: transforming a simple cardboard box and an old T-shirt into a cozy, custom cat bed. It’s incredibly easy, costs next to nothing, and gives you the satisfaction of making something special for your furry companion.

Why bother making a cat bed when you can buy one? Well, besides the obvious cost savings, it’s a fantastic way to recycle materials you already have lying around. That Amazon box and the T-shirt that’s seen better days can get a second life instead of ending up in landfill. Plus, you get to customize it! You choose the box size and the T-shirt color or pattern, creating something unique that fits your home and your cat’s personality (or at least, the T-shirt you’re willing to sacrifice). And let’s be honest, there’s a certain pride in watching your cat happily snooze in something you made with your own hands.

Gathering Your Supplies: The Treasure Hunt

Before you embark on this creative endeavor, you’ll need to gather a few simple items. Most likely, you already have everything you need.

Here’s your checklist:

  • A Cardboard Box: The star of the show! Look for a sturdy box that’s appropriately sized for your cat. It should be large enough for them to comfortably turn around and lie down in, but small enough to feel snug and secure. A box roughly 15-20 inches wide and deep is often a good starting point for an average-sized cat. Ensure it’s clean and free from any staples or sharp edges inside.
  • An Old T-Shirt: Choose a T-shirt that you no longer wear (or one you’re willing to donate to the cause). Size matters here – a larger T-shirt (like an adult L or XL) generally works best as it needs to stretch comfortably over the box. The fabric should have a bit of stretch to it. Make sure it’s clean before you start.
  • Sharp Scissors or a Box Cutter: For modifying the cardboard box. Precision isn’t crucial, but a clean cut looks nicer.
  • Packing Tape or Duct Tape (Optional but Recommended): Useful for reinforcing the box flaps or securing any loose edges.
  • Soft Bedding (Optional): An old towel, a small fleece blanket, or even just some extra fabric scraps can be placed inside the finished bed for added comfort.
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Choosing the right box is probably the most critical part. Too small, and your cat won’t fit. Too large, and it might not feel secure enough. Observe where your cat likes to nap already – do they curl up small or stretch out? This can give you clues about their preferred sleeping dimensions. If the box has flaps on top, you can either tape them shut securely or cut them off entirely.

Creating Your Cat’s New Favorite Spot: Step-by-Step

Alright, supplies gathered? Let’s get crafting! This process is straightforward and shouldn’t take more than 15-20 minutes.

Step 1: Prepare the Box

First, decide which side of the box will be the “bottom” of the cat bed. If the box has top flaps, fold them inwards or outwards and tape them down securely so they don’t collapse on your cat. You want the structure to be stable. Now, choose one of the sides to be the entrance. Using your scissors or box cutter, carefully cut an entrance hole. A U-shape or an arch works well. Make it large enough for your cat to get in and out easily, but not so large that it compromises the cozy, enclosed feeling. Aim for an opening about 6-8 inches wide and high, depending on your cat’s size. Smooth down any rough edges around the cut to avoid paper cuts (for both you and the cat!).

Safety First! Always be careful when using sharp tools like box cutters or scissors. Cut away from your body and keep your fingers clear of the blade path. Supervise children if they are helping with this project.

Step 2: Position the T-Shirt

Lay the T-shirt out flat. Now, take your prepared cardboard box and place it on top of the T-shirt, centering it. The key is to align the neck hole of the T-shirt with the entrance hole you cut into the box. This neck hole will become the natural, soft-edged entryway for your cat bed. Make sure the box opening and the T-shirt neck hole line up neatly.

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Step 3: Stretch and Secure

This is where the magic happens! Carefully begin stretching the T-shirt fabric down over the sides of the box. Start pulling the bottom hem of the T-shirt down towards the bottom of the box. The fabric should be taut but not overly strained. Pull the sleeves down the sides as well. Once the main body of the shirt is covering the top and sides of the box, flip the whole thing over (carefully!).

Now, you need to deal with the excess fabric on the bottom. Pull the bottom hem and the sleeve ends tightly towards the center of the box’s underside. You can secure them in a few ways:

  • Tucking: If the shirt is large enough and the box isn’t too thick, you might be able to simply tuck all the loose ends tightly inside the bottom edge of the box itself.
  • Tying: Gather the excess fabric (sleeves and bottom hem) in the middle of the box’s bottom and tie them together in a knot. This works well with larger shirts.
  • Taping: For a really secure finish, use packing tape or duct tape to tape the edges of the T-shirt fabric firmly to the bottom of the box. This prevents the shirt from slipping off later.

Ensure the fabric is smooth over the box, especially around the entrance (the neck hole). Adjust as needed until it looks like a snug little fabric cave.

Making it Extra Inviting

You’ve built the structure, but comfort is key! While the T-shirt provides a soft outer layer, the inside might still be plain cardboard. To elevate the coziness factor, place some soft bedding inside. An old, soft towel, a small fleece blanket, a piece of faux fur, or even another folded T-shirt works perfectly. Choose something washable, as you’ll want to clean it periodically. The goal is to create a plush, warm surface for your cat to curl up on.

Some cats are particularly drawn to familiar scents. Consider placing an item inside that already smells like you or like them (perhaps a small blanket they already use) to make the new bed feel instantly welcoming.

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Placement and Introduction: The Grand Unveiling

Where you place the new bed matters. Cats often prefer quiet, low-traffic areas where they feel safe and can observe their surroundings without being disturbed. Consider a corner of the living room, near a window (but out of direct drafts), or in a spot where your cat already enjoys lounging. Avoid placing it right next to their food and water bowls or litter box.

Don’t be discouraged if your cat doesn’t immediately jump into their new abode. Cats can be cautious creatures. Introduce them gently. Place the bed in the chosen spot and let them discover it on their own. You can try enticing them with a sprinkle of catnip inside or placing a favorite toy or treat near the entrance. Never force your cat into the bed; this will likely have the opposite effect. Patience is key; they’ll likely investigate and claim their new cozy cave when they’re ready.

Customization Corner

Want to get even more creative? Before putting the T-shirt on, you could decorate the box itself! Use non-toxic paints or markers to add patterns or your cat’s name. Just ensure everything is completely dry and fume-free before proceeding. You could also experiment with different fabrics – perhaps a cozy flannel shirt for winter or a lighter cotton for summer? The basic principle remains the same.

Keeping it Clean

One of the best things about this design is its ease of cleaning. When the T-shirt cover gets dirty or covered in fur (which it inevitably will), simply untuck or untape the bottom, slip the shirt off the box, and toss it in the washing machine! Let it dry completely before putting it back on the box. You can wipe down the inside of the box if needed, and wash any internal bedding regularly too.

A Purrfectly Simple Project

There you have it – a simple, eco-friendly, and virtually free way to create a comfy hideaway for your beloved cat. This DIY T-shirt cat bed combines a cat’s love for boxes with their need for security and warmth. It’s a fun, quick project that repurposes common household items and results in a cozy retreat your feline friend is likely to adore. Give it a try and watch your cat enjoy the fruits (or rather, the naps) of your labor!

Rory Gallagher, Founder & Chief Pet Experience Enthusiast

Rory is a lifelong animal lover and the proud parent of a lively rescue dog, two curious cats, and a talkative parrot. With over 15 years of personal experience navigating the joys and adventures of living with a multi-species family, Rory created PetsExperience.com to share practical tips, creative ideas, and inspiring stories for fellow pet enthusiasts. When not writing, you can find Rory exploring nature trails with their dog, attempting new DIY pet projects, or simply enjoying a quiet afternoon with a purring feline co-worker.

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