How Do I Know What Size Cat Flap To Get?

Do you have a cat that loves to explore the great outdoors, but also wants the comfort of home? If so, installing a cat flap can be a game-changer. But with so many sizes and styles available, how do you know what size cat flap to choose?

Don’t worry, we’ve got all the information you need to make an informed decision that will keep your feline friend happy and safe. After all, each cat is unique, and choosing the right size cat flap is crucial to ensure your pet can easily access their new door without any discomfort or trouble.

In this article, we’ll guide you through all the important factors to consider when selecting a cat flap. We’ll cover everything from the weight and size of your cat to the location for installation and your own individual preferences.

So sit back, relax, and let’s dive deep into the world of cat flaps together. By the end of this article, you’ll be equipped with all the knowledge you need to choose the perfect fit for your furry companion.

Step 1: Measure Your Cat

The first step is to measure your cat accurately. This might seem like a simple task, but getting precise measurements is essential to ensure that the cat flap is the right size for your feline friend.

To measure your cat’s height, have them stand up on their hind legs and measure from the ground to the top of their shoulders. This measurement gives you an idea of how tall the cat flap needs to be so that your cat can walk through it comfortably.

Next, measure your cat’s width by measuring from shoulder to shoulder at the widest point. This measurement will give you an idea of how wide the cat flap needs to be so that your cat can fit through it without getting stuck.

In addition to height and width, it’s vital to take into account your cat’s weight when selecting a cat flap size. Larger or overweight cats may need a bigger flap than smaller or average-sized cats.

Remember, some cats may be hesitant to use a cat flap, particularly if they are not used to it. In this case, choose a larger flap that will be easier for your kitty to navigate until they become accustomed to using it regularly.

When comparing sizes of cat flaps, check the manufacturer’s detailed measurements and weight limits for each product. It’s better to select a slightly larger flap than necessary to ensure that your cat can continue using it as they grow older or gain weight.

Finally, consider your cat’s age and future potential growth spurts. Selecting a slightly bigger flap than required ensures that your pet can continue to use it comfortably in the long term.

Step 2: Compare Measurements to Available Cat Flap Sizes

Now that you’ve got your cat’s measurements, it’s time to find the perfect cat flap size. Don’t worry, we’ve got you covered. Follow these steps to ensure that your kitty can come and go with ease.

First and foremost, take note of the width and height of your cat. This is crucial in selecting a cat flap size. You want to make sure that the opening is wide enough for your cat to pass through comfortably, without feeling cramped or getting stuck. Additionally, the height of the cat flap should be tall enough for your cat to easily step through without having to crouch down. Keep in mind that some cat flaps may have dimensions listed as “overall dimensions,” including the frame of the flap, which can be misleading when determining if your cat will fit through the opening. Always look for specifications that list the actual flap opening size.

How Do I Know What Size Cat Flap To Get-2

Next up, consider your cat’s weight. Most cat flaps have a weight limit, so make sure to select a size that accommodates your cat’s weight so they can easily pass through without any struggles.

Lastly, think about your cat’s potential growth if they are still a kitten or young cat. Selecting a larger size now will save you from having to replace the cat flap as your furry friend grows into adulthood.

To sum it up:

  • Measure your cat’s width and height
  • Look for specifications that list the actual flap opening size
  • Consider your cat’s weight
  • Think about potential growth

Considerations for Heavier Cats

But if you have a heavier cat, choosing the right size and type of cat flap can be a bit of a challenge. Fortunately, with these expert tips, selecting the perfect cat flap for your furry friend will be a breeze.

Firstly, size matters. When selecting a cat flap for your heavier cat, you need to make sure it is wide and tall enough to comfortably accommodate their size. Measuring your cat’s height and width is crucial before making your purchase. Remember that larger flaps will make it easier for your pet to use.

In addition to size, the strength of the cat flap is also crucial. A heavier cat will put more pressure on the flap as they use it frequently. Therefore, it’s essential to choose a model that is durable enough to withstand this extra weight. Look for flaps made from sturdy materials like heavy-duty plastic or metal that can handle repeated use from heavier pets.

When selecting a cat flap for your heavier cat, don’t forget to consider the installation process. A poorly installed flap may break or become damaged over time, causing injury or inconvenience. Choose a model that comes with clear installation instructions and all the necessary hardware or hire a professional installer if needed.

Lastly, your cat’s comfort should also be taken into account when selecting a cat flap. Heavier cats may find it difficult to fit through smaller or tighter flaps, leading to discomfort or even injury over time. Go for a model that provides ample space for your pet to enter and exit without having to squeeze through tight spaces or contort themselves in uncomfortable positions.

Considerations for Nervous Cats

Caring for a nervous cat can be a challenge, but choosing the right cat flap can make a big difference in providing comfort and security for your furry friend. Here are some expert tips to help you choose the perfect cat flap that meets your cat’s needs.

Size is the first consideration when selecting a cat flap for your nervous kitty. You want to ensure that the flap is large enough for your cat to comfortably enter and exit without feeling cramped or claustrophobic. A small or narrow flap can cause your cat to feel anxious or hesitant to use it. Measure your cat’s height and width to ensure that the flap provides enough space for them to pass through comfortably.

Noise level is another important factor to consider. If your cat is easily startled by loud noises, look for a flap with a quieter mechanism or one that can be adjusted to reduce noise. Additionally, you may want to opt for a flap with brush seals or draft excluders that can help muffle any noise and create a calm environment for your feline friend.

Placement of the flap plays an essential role in creating a safe and secure environment for your nervous cat. Choose a quiet area away from any loud appliances or other sources of noise. If your cat is particularly skittish, consider covering the flap at night or during times when you’re not home to help them feel more secure.

Introducing your nervous cat gradually to the new flap is crucial in helping them feel comfortable using it. Start by propping it open so they can get used to seeing it and walking through it without feeling any pressure. Over time, gradually close the flap more and more until your cat is comfortable using it on their own.

Additional Features to Look for in a Cat Flap

But when choosing a cat flap, there are additional features to consider beyond just the size of the flap. As an expert in this topic, I’m here to guide you through the must-have features that will ensure a comfortable and safe experience for both you and your pet.

Let’s start with the locking mechanism. While some cat flaps come equipped with a simple lock, others offer more advanced options such as remote control or microchip technology. Remote control cat flaps allow you to lock and unlock the door from a distance, making it easy to keep your cat inside when needed. On the other hand, microchip cat flaps use your cat’s implanted microchip as a key to unlock the flap. With this feature, only your cat can access the door, ensuring security and peace of mind.

Weatherproofing is another important feature to consider, especially if you live in an area with extreme weather conditions. In such cases, investing in a cat flap with weatherproofing features like double-flap insulation or draft excluders can keep your home comfortable and prevent unwanted drafts from sneaking in through the flap.

Safety should always be a top priority when it comes to pet-related products. Look for models that have a magnetic closure or other safety feature to prevent curious cats from getting stuck or injured. Additionally, some models come with a curfew mode that locks the flap at specific times, keeping your cat safe inside during dangerous hours.

Finally, don’t forget about the overall design and aesthetics of the cat flap. With various styles available on the market, choose one that fits well with your home’s decor and style, so that it blends seamlessly into the space.

Different Types of Cat Flaps

A cat flap is a great solution. With so many different types of cat flaps available, it can be overwhelming to choose the right one for your feline friend. Here are the advantages and disadvantages of the different types of cat flaps on the market.

Manual Cat Flaps:

Manual cat flaps are the most basic and affordable option. Your cat pushes through the door to open it, but there’s no locking mechanism, so any animal can come and go as they please. These flaps are best for cats that are comfortable using a door and don’t need any extra features. However, they don’t provide any security or protection from unwanted intruders.

Magnetic Cat Flaps:

Magnetic cat flaps require your cat to wear a magnet on their collar, which activates the door when they approach it. This type of flap is useful if you want to prevent other cats or animals from entering your home. However, they tend to be more expensive than manual flaps and require batteries to operate. Additionally, if your cat loses their collar or the magnet falls off, they won’t be able to use the flap.

Microchip Cat Flaps:

Microchip cat flaps work similarly to magnetic flaps but use your cat’s microchip as a key instead of a magnet. This type of flap ensures that only your cat can enter your home and provides added security. However, they can be costly and may not work with all types of microchips. If your cat isn’t microchipped, you’ll need to purchase a separate chip to use with the flap.

Electronic Cat Flaps:

Electronic cat flaps are the most advanced option. They use sensors to detect when your cat is approaching and open automatically. They also have a locking mechanism that prevents other animals from entering your home. These flaps tend to be more expensive than other types, and they require batteries or a power source to operate. Additionally, if the sensors malfunction, your cat may not be able to use the flap.

Benefits of Installing a Cat Flap

Installing a cat flap might just be the answer you’ve been looking for. Not only does it provide convenience for you, but it also offers numerous benefits for your furry friend.

First and foremost, a cat flap is incredibly convenient. You won’t have to constantly open and close doors for your cat, which can be a godsend if you have a busy schedule or are away from home for long periods of time. Your cat will love the newfound independence, and you’ll appreciate the extra time on your hands.

Moreover, a cat flap provides exercise for your cat. Cats are explorers by nature, and they need physical activity to stay healthy. By installing a cat flap, you’ll be giving them the opportunity to explore the great outdoors and keep themselves mentally stimulated. And let’s be honest – watching your cat as they run around in the yard is pure entertainment.

In addition to exercise, a cat flap gives your feline friend independence. Cats are naturally independent creatures, and a cat flap allows them to maintain their autonomy by giving them the freedom to come and go as they please. They won’t have to rely on you anymore, and that sense of control can do wonders for their mental wellbeing.

But it’s not just about convenience and freedom – installing a cat flap can also provide safety benefits for your cat. In an emergency situation, such as a fire, they will have an easy way out of the house. It’s a small but significant peace of mind knowing that your furry friend can take care of themselves in potentially dangerous situations.

Last but not least, installing a cat flap can reduce scratching behavior in cats that are not able to go outside. Cats may become bored or frustrated when they’re stuck indoors for long periods of time, which can result in destructive behaviors like scratching furniture or carpets. Allowing them outdoor access through a cat flap can reduce their desire to scratch and mark their territory indoors.

When choosing the right size cat flap for your pet, make sure to consider their height, weight, and width. You want to choose a flap that’s comfortable for your cat to use, but also secure enough to prevent unwanted animals from entering your home. Additionally, consider the location of the flap – if it’s near potential hazards, opt for a more secure locking system or even consider keeping your cat indoors.

How to Install a Cat Flap

Constantly opening and closing doors can be a hassle, not to mention the risk of unwanted critters entering your home. That’s where a cat flap comes in handy. Installing a cat flap is easy, but it’s essential to choose the right size for your furry friend. Here’s a comprehensive guide on how to install a cat flap:

Step 1: Measure Your Cat

Before purchasing a cat flap, measure your cat’s height and width at the widest part of their body. You’ll also want to consider their weight as heavier cats may need larger openings. To do this, get your cat to stand up straight and measure their height from the ground to the top of their shoulders. Next, measure the width of their body at its widest point.

Step 2: Choose the Right Size

Once you have these measurements, compare them to the sizes of available cat flaps. Most manufacturers provide detailed measurements and weight limits for their products, so be sure to check these carefully before making a purchase. Remember, getting the wrong size flap can cause unnecessary stress and discomfort for your pet.

Step 3: Position the Flap

When installing the cat flap, make sure you position it at the right height for your cat’s measurements. The bottom of the flap should be low enough for your cat to comfortably step over, but not so low that other animals can enter your home. You also want to make sure that the flap is positioned in a location that your cat can easily access.

Step 4: Cut the Hole

Use a jigsaw or similar tool to cut out the outline of the flap. Make sure you cut the hole slightly smaller than the actual size of the flap so that it fits snugly into place. Take care when cutting through any insulation or wiring that may be present.

Step 5: Attach the Frame and Flap

Attach the frame of the flap to the door or window using screws or adhesive. Once the frame is securely in place, attach the flap itself. Some flaps come with magnetic strips that help keep them closed when not in use. Make sure that the flap is attached securely to prevent it from falling out or becoming damaged.

Step 6: Encourage Your Cat

Encourage your cat to use the new flap by holding it open and calling your cat through it. You may need to do this a few times before your cat feels comfortable using the flap on their own. If your cat is particularly nervous, you can try placing treats or toys on the other side of the flap to encourage them to use it.


In conclusion, finding the perfect cat flap size is not just a matter of convenience, but also crucial for your furry friend’s comfort and safety. Accurately measuring your cat’s height, width, and weight is the first step in selecting the right fit. But don’t forget to consider potential growth and look for specifications that list the actual flap opening size.

While size is important, there are other features to keep in mind when choosing a cat flap. Locking mechanisms, weatherproofing, and safety features can all make a difference depending on your needs. With so many types of cat flaps available on the market, it’s worth taking some time to do your research.

Installing a cat flap has numerous benefits for both you and your pet. It offers them independence, exercise, and helps reduce destructive scratching behaviors. In emergencies, it can even provide safety benefits. However, it’s important to position the flap at the right height for your cat’s measurements and encourage gradual use.

By following these expert tips and considerations when selecting a cat flap size and type that suits your feline friend’s unique needs will ensure they can come and go with ease while keeping them happy and safe.