Is There a Mattress Size Between Twin and Full? Your Clear Guide to “In‑Between” Options

If you’re asking “Is there a mattress size between twin and full?”, you’re likely trying to find just a bit more space than a standard twin, without taking up as much room as a full. This guide walks through what actually exists between these two sizes, how the dimensions work, and when that in‑between size makes sense.

Is There a Mattress Size Between Twin and Full?

Yes. The most commonly recognized size between twin and full is often called a twin XL or an extended twin.

While a twin XL is not wider than a regular twin, it adds extra length. So, technically, there isn’t a standard size that’s both wider than a twin and narrower than a full, but there is a size that sits “between” them in terms of overall space: same width as a twin, closer in total sleeping area to a full because of the added length.

Here’s how the core sizes usually compare:

Dimensions may vary slightly by manufacturer, but the general differences are consistent.

Why Do People Look for a Size Between Twin and Full?

Many shoppers search “Is there a mattress size between twin and full” because they:

• Have a small room but want more comfort than a regular twin can offer
• Are taller sleepers who find a twin too short
• Are furnishing a guest room, dorm, or studio where every inch matters
• Want to make sure the mattress fits with existing frames or bedding

Often, the question is really:
“Can I get more space than a twin without going all the way up to a full?”

In reality, the standard way to achieve this is to add length (twin XL) rather than width.

What Exactly Is a Twin XL, and How Is It “Between” Twin and Full?

How twin XL compares to twin and full

• Width:

  • Twin and twin XL: about 38 inches wide
  • Full: about 54 inches wide
  • Twin XL does not solve width issues – it’s still a narrow bed.

• Length:

  • Twin and full: about 75 inches long
  • Twin XL: about 80 inches long
  • Twin XL offers more legroom, especially helpful for taller users.

So when people ask “Is there a mattress size between twin and full?”, the closest standard option is twin XL, because:

• It gives more sleeping surface than a twin (thanks to extra length)
• It takes up less floor space than a full (narrower width)

For many, this feels like a good compromise between space-saving and comfort.

Are There Any Wider Sizes Between Twin and Full?

In standard North American sizing, there is no mainstream mattress that is slightly wider than a twin but not as wide as a full.

However, you may occasionally see:

• Custom or specialty widths offered by certain manufacturers
• European or non‑standard sizes that fall between twin and full width
• Daybed or RV sizes that are close to these dimensions

These options are typically less common and may make bedding and frames harder to find. For most shoppers focused on simplicity and availability, twin, twin XL, and full remain the practical choices.

How Do I Choose Between Twin, Twin XL, and Full?

When deciding, it helps to think about:

1. Who will be using the mattress?

• Children or shorter sleepers:
  • A twin is usually sufficient if width and length feel comfortable.
• Taller teens, students, or adults who sleep solo:
  • A twin XL can be useful for extra legroom without needing a bigger room.
• Someone who likes more elbow room or shares occasionally:
  • A full may feel more comfortable thanks to the increased width.

2. How big is the room?

• Very small rooms or tight spaces:
  • Twin or twin XL can leave more open floor area.
• Moderate-sized rooms or multipurpose spaces (guest room/office):
  • A full can balance space and comfort, if width is a priority.

3. Existing furniture and bedding

Before choosing any size between twin and full:

• Check your bed frame dimensions and weight limits
• Make sure you can find sheets, protectors, and bedding in that size
• Consider whether you might later upgrade to a larger bed and want bedding that can transfer

✔️ Quick Mattress Takeaways

Key points consumers should understand about “Is There a Mattress Size Between Twin And Full”

• There is no standard mattress that is both wider than a twin and narrower than a full.
• The twin XL is the closest “between” size, adding length (about 5") while keeping twin width.
• Twin: best for smaller sleepers or very tight spaces.
• Twin XL: good for taller individuals who still need a compact bed.
• Full: noticeably wider than twin/twin XL, better for those who want more side-to-side room.
• Specialty or custom sizes between twin and full width exist but are less common and may make accessories harder to find.
• When choosing, consider who is using the bed, room size, and available bedding and frames.

Understanding how twin, twin XL, and full compare makes it easier to answer “Is there a mattress size between twin and full?” for your specific situation. With the basic dimensions in mind, you can choose the option that fits both your room and your comfort needs.