Mattress Sizes: Buying Guide - Kichechef

What Mattress Size Should You Choose? The Guide to Better Sleep

Choosing the right mattress size should never be left to chance. Whether you need a single, Queen Size, or King Size bed, the dimensions of your mattress have a direct impact on the quality of your sleep. Traditional mattress sizes no longer meet everyone’s needs, especially since the average height has increased by nearly 4.5 cm in one generation. To sleep comfortably and enjoy complete freedom of movement, there are a few simple guidelines to follow. At Kichechef Luxembourg, we go one step further with our SLEEP-DNA® technology. In just 10 minutes, we analyze your sleep profile to configure a custom-made bed perfectly suited to your body type.

Why Your Height and Weight Matter Most

A good night’s sleep starts with one essential ergonomic rule: your mattress should be at least 15 to 20 cm longer than the tallest person sleeping in the bed. This prevents your feet from hanging over the edge and helps avoid unconscious micro-awakenings caused by a lack of space.

Length: No More Feet Hanging Over the Edge

If you are 1.75 m tall, a standard 190 cm mattress is just long enough. Upgrading to a 200 cm mattress is highly recommended to allow your spine to fully extend. Are you taller than 1.85 m? Then a 210 cm or 220 cm mattress (available custom-made from Ergosleep®) is the only way to ensure maximum comfort.

Width: Move Freely Throughout the Night

The average sleeper changes position between 40 and 60 times each night. This movement is essential for healthy blood circulation and muscle recovery. If your bed is too narrow, your body remains under unconscious tension. People with an L or XL body type will quickly feel restricted on a 90 cm mattress and should consider a 120 cm mattress for optimal comfort when sleeping alone.

Minimum and Recommended Mattress Lengths

• If you are under 1.70 m tall: A 190 cm mattress is both the minimum and the recommended length.

• If you are between 1.70 m and 1.80 m tall: Choose a 200 cm mattress for optimal comfort.

• If you are taller than 1.85 m: The absolute minimum is 200 cm, but the ideal mattress length is 210 or 220 cm (available custom-made at Kichechef).

The Queen Size and King Size Revolution

• Queen Size (160 × 200 cm): It provides 80 cm of sleeping space per person. This extra room helps reduce sleep disturbances caused by your partner’s movements and promotes deeper, more restful sleep.
• King Size (180 × 200 cm): The ultimate level of comfort. Each person enjoys the space of a full single bed, allowing complete freedom of movement without disturbing the other.

The Exclusive Ergosleep® Advantage at Kichechef

Every sleeper has unique needs. Thanks to Sleep DNA, each side of your double bed can be adjusted independently. Does your partner need firm lumbar support while you prefer softer shoulder comfort? With Ergosleep®, both preferences can be combined in a single mattress.

The Kichechef Experience: Why Take Your Sleep DNA Test?

Why keep choosing a mattress based solely on how it feels in-store when science can provide the exact answer? At our Ergosleep® showroom in Capellen, we use the patented SLEEP-DNA® system, developed through over 40 years of scientific research.

How Does the Free Test Work?

1. Body Analysis (8–10 minutes): Lie down in our high-tech testing area while the system analyzes your weight, height, posture, and pressure points.
2. Detailed Report: Instantly discover where your body needs more support (lower back) and greater pressure relief (shoulders and hips).
3. Personalized Configuration: Your results are directly integrated into the setup of your bed base, mattress, and pillow.

The result is immediate: optimal spinal alignment, reduced muscle tension, and a noticeably faster time to fall asleep.

Designing Your Bedroom

Choosing the right mattress size also depends on the size of your bedroom. A bed that is too large can make your sleeping space feel cramped.

• The 60 cm Rule: Always leave at least 60 cm (ideally 80 cm) of space around your bed so you can move around comfortably and make your bed with ease.
• Small Spaces: For studios or compact rooms, Kichechef offers wall beds (Murphy beds) and trundle beds. Enjoy a full-size 140 cm or 160 cm mattress at night while freeing up valuable floor space during the day.

Don’t Overlook Your Duvet and Bed Sheets

A duvet that’s too small can reduce your comfort. To prevent cold air from getting in, your duvet should extend 30 to 40 cm beyond your mattress on each side.

• For a 90 × 190 cm mattress: Choose a 140 × 200 cm duvet (standard fit).

• For a 140 × 190 cm mattress: Opt for a 220 × 240 cm duvet (ideal comfort and drape).

• For a 160 × 200 cm mattress (Queen Size): Choose a 240 × 260 cm duvet for an elegant hotel-style look.

• For a 180 × 200 cm mattress (King Size): Go for a 260 × 240 cm duvet for maximum luxury.

⚠️ Don’t Forget the Fitted Sheet: Modern mattresses are often thicker (25 to 30 cm). Always check the pocket depth of your fitted sheet. It should be at least 5 cm deeper than your mattress to ensure a secure fit.

Your Questions About Mattress Sizes

1. What mattress length should I choose if I am 1.85 m tall?

The general rule is to add 15 to 20 cm to your height. If you are 1.85 m tall, a 200 cm mattress is the absolute minimum, but a 210 cm mattress will provide significantly greater comfort.

2. Can I use two 90 cm mattresses on a 180 cm bed base?

Yes, and it is highly recommended for couples with different body types or comfort preferences. It provides excellent motion isolation. At Kichechef, we can combine the two mattresses with a single mattress topper to eliminate the gap between them.

3. Will a King Size (180 × 200 cm) bed fit in a 12 m² bedroom?

It is possible, but space will be limited. To maintain the recommended 60 cm of clearance around the bed, your room should ideally be at least 3 meters wide. Our Kichechef advisors can help you visualize the layout.

4. What does the Sleep DNA test offer that a standard in-store test doesn’t?

A traditional in-store test is subjective (“it feels comfortable”). The Sleep DNA test is based on scientific analysis. It measures your body’s pressure points to remove the guesswork and ensure your spine is perfectly aligned.

5. When should I replace my mattress?

On average, every 10 years. If you wake up with lower back stiffness or feel every movement your partner makes during the night, it may be time to book your free Sleep DNA analysis at Kichechef Capellen.