What Size Mattress Should I Get?

While it might seem like a simple decision, choosing the right mattress size affects everything from how well you sleep to how your bedroom functions. Thanks to nearly 40 years of handcrafting mattresses in Southern California using premium natural materials, Custom Comfort Mattress has helped thousands of sleepers find their perfect fit – and we can help you do the same. This guide walks you through mattress dimensions, room size requirements, and the lifestyle factors that determine which size mattress fits your life best.

Understanding Mattress Sizes & Why It Matters

Standard mattress sizes range from the compact twin size mattress to spacious king mattress options, each designed for different sleepers and spaces. Here are the standard mattress dimensions you’ll find:

• Twin: 38″ × 75″
• Twin XL: 38″ × 80″
• Full: 54″ × 75″
• Full XL: 54″ × 80″
• Queen: 60″ × 80″
• King: 76″ × 80″
• California King: 72″ × 84″

Understandably, bed dimensions have a direct impact on sleep quality. For example, a mattress that’s too small restricts natural movement, which can disrupt sleep cycles and cause morning stiffness. Couples on undersized mattresses often experience partner disturbance, with every toss and turn transferring across the surface. Conversely, adequate sleeping space allows sleepers to shift positions freely, supporting spinal alignment and reducing pressure on their back and hips.

What many shoppers don’t realize is that pairing the right mattress size with quality construction makes all the difference in sleep quality. Custom Comfort Mattress builds every mattress to order, optimizing comfort at every mattress size. And because many Custom Comfort Mattress designs are dual-sided, you get consistent support throughout the mattress’s lifespan – simply flip to extend comfort and longevity.

How to Choose the Right Mattress Size

Deciding which mattress size to get should be approached systematically, balancing practical limitations with personal comfort needs. For some sleepers, the right choice isn’t between twin, queen, or king — it’s recognizing when a standard mattress size doesn’t truly fit, and a custom or oversized mattress makes more sense.

Assess Your Room Size and Layout

Before falling in love with a king bed, measure your bedroom. Your ideal mattress size will allow ample clearance for nightstands, dressers, and comfortable walking paths around the bed frame. Here are the minimum recommended room sizes for each standard bed size:

• Twin or Twin XL: 7′ × 10′ minimum
• Full or Full XL: 9′ × 10′ minimum
• Queen: 10′ × 10′ minimum
• King: 12′ × 12′ minimum
• California King: 12′ × 12′ minimum

Small bedrooms and apartments often work best with twin XL mattresses or full mattresses, which provide adequate sleeping space without crowding the room. Primary bedrooms typically accommodate queen or king-size mattresses comfortably, while guest rooms benefit from the versatility of a full- or queen-size mattress. Be sure to consider door and window placement and how they impact your usable room size as well.

Evaluate Your Lifestyle and Sleep Needs

Your daily life shapes which mattress size serves you best. Solo sleepers who stay relatively still may find a full mattress perfectly comfortable, while active sleepers who change positions frequently benefit from the extra room a queen provides.

Couples should consider their combined sleep styles. If one partner moves often or runs warm, a king or California King mattress helps prevent disturbances and allows each person their own sleep space. Families with children or pets who occasionally share the bed will appreciate the additional surface area larger mattresses offer.

Custom Comfort Mattress sleep specialists offer expert guidance and personalized consultations that take these factors into account, helping you match your actual sleep habits and bedroom space to the right mattress size.

Mattress Sizes Explained

Twin and Twin XL Mattresses

Twin mattresses (38″ wide × 75″ long) are suitable for children, teens, and single adults in compact spaces. The standard twin works well for kids and fits easily into bunk bed frames, while the Twin XL adds five inches of length – ideal for taller teens or adults in studio apartments and dorm rooms.

• Best for: Children, teenagers, single adults, guest rooms, and smaller spaces.
• Explore Options: Twin Mattresses | Twin XL Mattresses

Full and Full XL Mattresses

Full mattresses (54″ wide × 75″ long) offer considerably more width than twin beds, making them a practical choice for single adults who want more room to stretch. The Full XL extends the length to 80”, accommodating taller sleepers without requiring the floor space of a queen.

• Best for: Single adults, teens transitioning from twin beds, and guest bedrooms.
• Explore Options: Full Mattresses | Full XL Mattresses

Queen Mattresses

The queen-size mattress (60″ wide × 80″ long) remains the most popular mattress size for good reason: it balances the sleeping surface with room efficiency. Couples have enough space to sleep comfortably without requiring a massive bedroom, and single sleepers enjoy the luxury of spreading out.

• Best for: Couples, single adults who prefer extra space, and moderate-sized master bedrooms.
• Explore Options: Queen Mattresses

King Mattresses

King mattresses (76″ wide × 80″ long) provide the sleep area couples need for the most undisturbed sleep. Each partner gets roughly the equivalent of a twin mattress, eliminating the compromise that smaller sizes require.

• Best for: Couples who value personal sleep space, families with co-sleeping children, and spacious primary bedrooms.
• Explore Options: King Mattresses

California King Mattresses

The California King mattress (72″ wide × 84″ long) trades four inches of width for four inches of length compared to a standard king. If space allows, it’s ideal for taller sleepers (over 6 feet) and those who like extra legroom.

• Best for: Tall sleepers, couples where one or both partners are over 6 feet tall, and longer, narrower bedroom layouts.
• Explore Options: California King Mattresses

The Custom Comfort Mattress Difference

Custom Comfort Mattress offers a full array of standard mattress sizes, as well as oversized and fully custom dimensions designed for sleepers and spaces that fall outside typical sizing.. Every mattress size we make is handcrafted in California with comfort and longevity in mind. By prioritizing durable natural materials, double-sided construction, and superior edge support, a Custom Comfort Mattress ensures that you never have to sacrifice quality, performance, or customer service.

When Should You Size Up or Down?

Certain life events signal it’s time to reconsider your mattress size. Moving to a new home with a different bedroom layout, relationship changes, welcoming children, or adopting pets can all shift your sleep space requirements. Even changes in your own body, like weight fluctuations or new aches and pains, can mean your current bed size no longer supports you properly.

Body type and sleep position also influence sizing decisions. Larger-framed individuals and combination sleepers who rotate through multiple positions need more surface area to move comfortably. Side sleepers may want additional width to extend arms or legs without hanging off the edge.

This is where in-store sleep consultations prove invaluable. Custom Comfort Mattress specialists assess your body type, movement patterns, and support preferences to determine not just the right size, but the right mattress configuration for how you actually sleep.

When a Standard Mattress Size Isn’t Enough

While standard mattress sizes work well for most sleepers, they aren’t ideal for everyone. Taller individuals, larger-framed sleepers, and people who change positions frequently during the night may find that even a king or California King mattress feels restrictive.

In these cases, choosing an oversized mattress isn’t about luxury; it’s about proper fit. Extra width or length allows your body to rest fully supported, without feet hanging off the edge or feeling confined during natural movement.

Oversized and custom mattress dimensions can also make sense from a room-design perspective. In larger bedrooms or uniquely shaped spaces, standard mattress sizes may look undersized or disrupt layout flow. A custom-built mattress helps anchor the room visually while delivering the comfort and support your body needs.

An oversized or custom mattress may be worth considering if you:

• Are over 6 feet tall and need additional legroom
• Have a larger or broader body frame
• Share the bed but want more personal sleep space
• Move frequently or rotate positions throughout the night
• Want a mattress that better fits your room’s proportions

Why Mattress Size Isn’t Everything

Of course, bed dimensions matter, but materials and construction determine whether your mattress actually delivers restful sleep. A poorly made king won’t outperform a well-crafted queen. 

Custom Comfort Mattress uses cotton, wool, latex, and innerspring components – materials chosen for breathability, durability, and comfort. Natural latex provides responsive support that synthetic memory foam mattresses can’t match, while premium coil systems offer targeted pressure relief and edge-to-edge stability. Beyond materials, handcrafted construction means each new mattress is built with attention to detail that mass-produced options simply don’t receive.

Plus, only personalized construction lets you customize firmness preferences, address specific pain-relief needs, and build for long-term durability. Custom Comfort Mattress’s made-to-order approach means you can adjust the feel within any standard mattress size, ensuring your mattress supports your unique body and sleep style.

Find Your Perfect Fit

The right mattress size depends on your room dimensions, who’s sharing the bed, how you sleep, and what your body needs. But size alone doesn’t guarantee great sleep. Pairing the correct mattress dimensions – especially under the guidance of a helpful sleep consultant – with expert craftsmanship and quality materials makes a real difference.

Ready to find your ideal mattress size? Visit a Custom Comfort Mattress showroom near you for a personalized fitting with one of our sleep specialists. Experience our handcrafted, natural-material mattresses firsthand and discover the size and build that will transform your sleep.