Pets · Sizing
Cat Supplies Sizes Explained
By the Nest & Yard editorial teamUpdated 2026-08-094 min read
Our pick: the Amazon Basics Cat Tree Tower with Scratching Post and Hammock Bed for Indoor Cats, Beige — the best Cat Supplies we tested, from £19.89.
Choosing the right cat furniture and accessories can be tricky – it’s easy to get overwhelmed by the sheer variety of sizes available. Understanding how these products are measured and labelled is key to ensuring your feline friend has a comfortable space that fits perfectly into your home, whether you have a small apartment or a large house. This guide breaks down the common size descriptions used for cat trees, scratching posts, and other supplies, offering advice on measuring up before you buy – perhaps considering options like Amazon Basics Cat Tree Towers or larger cat condos from brands like Feandrea.
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#1 Pick
Amazon Basics Cat Tree Tower with Scratching Post and Hammock Bed for Indoor Cats, Beige- Sisal & particle board
- All Life Stages
£19.89
Pros
- Compact size fits smaller rooms and flats
- Sisal-wrapped post for scratching plus a hammock bed
- Extremely well reviewed for the price point
Cons
- Too small to double as a climbing frame for larger cats

#2 Pick
Amazon Basics Cat Scratching Post for Indoor Cats, Standard with Dangling Toy, 80 cm, Grey- Sisal
- Adult
£19.99
Pros
- Sisal-wrapped post satisfies natural scratching instincts
- Dangling toy adds extra play value
- Weighted base keeps the post stable during vigorous scratching
Cons
- Standard height may be short for larger, taller cats

#3 Pick
Feandrea Cat Tree, 206cm Large Cat Tower Condo with 13 Scratching Posts, 2 Perches, 2 Caves, Hammock- Sisal & particle board
- All Life Stages
£49.12
Pros
- Tall multi-level design gives cats plenty of climbing and lounging space
- 13 sisal-wrapped posts for scratching
- Includes caves, hammock and perches for enrichment
Cons
- Large footprint — needs a spacious room

#4 Pick
rabbitgoo Cat Harness and Lead Set, Escape Proof Vest with Soft Breathable Mesh and Reflective Strips- Mesh & nylon
- Adult
£11.88
Pros
- Escape-proof vest design with snap buckles is hard for cats to wriggle out of
- Soft, breathable mesh stays comfortable for outdoor exploring
- Reflective strips improve visibility on evening walks
Cons
- Some cats need several short sessions to get used to wearing it
FAQ
What does 'Small' mean for cat food and litter trays?
For cat food, ‘Small’ generally refers to pouches or tins designed for single-cat households or cats with smaller appetites – typically around 3.5kg to 6kg. Litter trays labelled ‘Small’ are usually compact, designed for one cat and often have a capacity of around 2 litres.
How is the size of a cat bed measured?
Cat beds are measured by diameter (the distance across) or length x width. Most standard cat beds will be approximately 50cm - 60cm in diameter, while larger ones could reach up to 75cm for bigger cats.
I have a large apartment – what size scratching post should I consider?
For a spacious apartment, you’ll want a tall scratching post, ideally one over 120cm high. Look for options with multiple levels and a substantial base to prevent tipping, particularly if your cat is an active jumper.
What does ‘Extra Large’ mean when buying cat carriers?
'Extra Large' cat carriers typically accommodate cats weighing 8kg or more and are designed to comfortably fit adult longhair breeds. They usually have a floor area of around 75cm x 50cm and a height of approximately 60cm.
How do I measure my cat for a harness?
Measure your cat’s chest at its widest point, just behind the front legs. Then, measure their neck circumference – this measurement is crucial to ensure a comfortable fit and prevent escape.
What's the difference between 'Standard' and 'Large' cat food pouches?
'Standard' pouches usually contain 300g of wet food, suitable for cats consuming around 150-200g per serving. ‘Large’ pouches often offer 500g or more, intended for multiple meals or larger appetites.
How do I choose the right size litter tray?
Consider your cat's habits when choosing a litter tray – a small tray (around 3 litres) is fine for cats who only go to the toilet once or twice a day, while larger trays (5-7 litres) are better if they need more frequent cleaning.
What’s important about measuring my cat's bed?
Always allow extra space; cats like to stretch out. A good rule of thumb is to add at least 15cm to your cat’s length when selecting a bed, ensuring they have plenty of room to curl up comfortably.
My cat loves to jump – what size cat tree should I buy?
If your cat enjoys climbing and jumping, prioritize height and stability. A cat tree with at least three levels, reaching 80cm - 120cm tall, is a good starting point.
How do I measure for a cat collar?
Measure around the base of your cat’s neck, ensuring the collar can slide comfortably over their head. Add an extra inch or two to allow for growth and movement – this ensures a secure and comfortable fit.
In depth
Measuring your cat’s needs isn't just about choosing a colour or pattern. Understanding the sizing conventions used for cat products – particularly beds, carriers, and toys – is crucial to ensuring they are comfortable, safe, and appropriate for your home environment. British manufacturers and retailers often utilise a system that can seem confusing at first glance, relying heavily on dimensions expressed in centimetres rather than standardised ‘small,’ ‘medium,’ or ‘large’ categories found in other areas of retail. This depth dive will break down the common sizing terminology, explain how it's applied to cat supplies, and guide you through the process of selecting the right size for your feline friend and your living space.
The most frequent measurement used is length, usually referring to the internal dimensions of a carrier or bed. However, width and height are equally important, particularly when considering the comfort and manoeuvrability of a product. Manufacturers will typically state these as interior measurements – the space *within* the product itself. For example, a cat carrier might be described as “45cm (L) x 30cm (W) x 28cm (H)”. This immediately tells you how much room the cat has to move and turn within the carrier, which is crucial for reducing stress during travel. Bed sizes are similarly defined; a ‘small’ bed might be 45cm x 50cm, while a ‘large’ could be 75cm x 60cm. Don't assume that a larger number automatically equates to more space for your cat – consider their individual size and sleeping habits. It's common to see some manufacturers offer dimensions as external measurements too; this is the total size of the carrier or bed including its sides, so you’ll need to factor in enough extra room for it to be easily moved around.
When choosing a cat carrier, pay particular attention to the internal height. Cats are surprisingly agile and can often squeeze into confined spaces, but even they appreciate having enough headroom to comfortably stand up and turn around. A carrier that is too short will restrict movement and could cause discomfort or anxiety. Similarly, the width needs careful consideration – a narrow carrier can make it difficult for a larger cat to navigate effectively. The depth should also be adequate; your cat needs enough space to lie down fully stretched out. For smaller breeds, a compact carrier might suffice, but larger cats will require a significantly more spacious option. A frequent sizing mistake is assuming that all carriers are the same size – always double-check the internal dimensions against your cat’s measurements before purchasing.
Cat beds, like carriers, are measured primarily by length and width. However, the depth of the bed can vary considerably, impacting how comfortable it is for your cat to curl up. Some beds have a shallow profile designed for cats who enjoy sprawling out, while others offer deeper sides for cats who prefer to burrow and nestle. Consider your cat’s preferred sleeping style when selecting a bed size. A long, slender cat will benefit from a longer bed, while a rounder cat might be happier with a more compact design. Again, remember that these dimensions refer to the interior space – the actual footprint of the bed in your living room will likely be larger due to the sides and base.
Toys are perhaps the most variable category when it comes to sizing. The length of a toy is usually measured from tip to tail, while the diameter of a ball or ring is measured across. However, some toys – such as interactive puzzles – have complex dimensions that can be difficult to assess. When purchasing toys, consider your cat’s play style and the space you have available. A large, plush toy might dominate a small room, while a collection of smaller toys could easily get lost under furniture. It is advisable to measure the height of shelving units or other obstacles where you plan to store toys to ensure they don't pose a hazard to your cat.
Finally, always remember that these are just guidelines. Every cat is an individual with unique needs and preferences. If possible, try to observe how your cat interacts with different sized products before committing to a purchase. Consider bringing your cat along when you visit a pet store or order online and return items if they don’t fit correctly or aren't suitable for your feline companion. Paying attention to these sizing details will ultimately contribute to a happier and more comfortable life for your cat, and ensure that their new possessions are the perfect fit for both of you.
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-09.