Mattress Size Guide

Not sure which mattress size is right for you? You’re in the right place. We’ll walk you through your options so you can choose with confidence.

Twin

38" x 75"
Best For:
Children, individual sleepers, small spaces
Room Size:
7' x 10' minimum
Why Choose This Size:
Perfect for kids' rooms, guest rooms, or studio apartments where space is limited.
Shop Twin

Twin XL

38" x 80"
Best For:
Tall individuals, college dorms
Room Size:
7' x 10' minimum
Why Choose This Size:
The most common size in college housing, offering extra length for taller sleepers while maintaining compact space restraints.
Shop Twin XL

Full

54" x 75"
Best For:
Individual sleepers who want more space
Room Size:
10' x 10' minimum
Why Choose This Size:
Great for single sleepers who want extra room to stretch out, or for guest rooms.
Shop Full

King

76" x 80"
Best For:
Couples who want maximum space, families
Room Size:
12' x 12' minimum
Why Choose This Size:
Provides ample space for couples, co-sleepers, families with pets, or those who simply love to spread out.
Shop King

Split King

76" x 80" (2x 38" x 80")
Best For:
Couples with different sleep preferences, adjustable bed bases
Room Size:
12' x 12' minimum
Why Choose This Size:
Two Twin XL mattresses side-by-side, perfect for adjustable bases and personalized comfort.
Shop Split King

California King

72" x 84"
Best For:
Tall individuals, couples who want extra length
Room Size:
12' x 12' minimum
Why Choose This Size:
Longer and narrower than a standard King, ideal for taller sleepers and narrower rooms.
Shop California King

Note: Room size recommendations include space for walking around the bed and other furniture. Measure your room carefully to determine your specific needs.

Size Dimensions Best For
Twin 38" x 75" Children, individual sleepers, small spaces
Twin XL 38" x 80" Tall individuals, small spaces, college dorms
Full 54" x 75" Individuals who want extra space, guest rooms
Queen 60" x 80" Couples, primary bedrooms
King 76" x 80" Couples who want extra space, co-sleepers, families with pets
Split King 2 x 38" x 80" Couples with different sleep preferences, adjustable bed bases
California King 72" x 84" Tall individuals, couples who want extra length

Frequently Asked Questions

  • We use our years of experience to design quality, comfortable, affordable mattressesβ€”backed by a 100-day sleep trial and 10-year warranty.

  • This is dependent on preference. It is important to note that a mattress feel isn't limited to these two categories. There are a variety of options available to you based on your sleep style and personal preference. Typically, side sleepers or those with back pain opt for a more plush option, while those who sleep on their back or stomach will prefer a firmer mattress.

  • Memory foam is designed to have a plush, sinking in feel while latex is designed to have more of a springy, responsive feel.

  • A traditional innerspring mattress will have a much springier feel than a solid memory foam mattress. Memory foam has a denser feel than springs and is designed to help with pressure points. Many first-time memory foam users find that an all-foam mattress has a firmer feel than their old innerspring mattress.

  • Mattresses typically last between 7-10 years, however there are many variables that influence the longevity of your mattress. We recommend using a mattress protector to help extend the life of your mattress.

  • No, this mattress is designed to hold any reasonable amount of human weight. Any weight limit will come from the bed frame the mattress is being used on.

  • All Lucid mattresses are made to work with any flat foundation without the need for a box spring. Simply place your base directly on an adjustable base, flat frame, or upholstered platform base.

  • When initiating a return for a Lucidβ„’ mattress or adjustable bed frame, there are a few important guidelines to keep in mind. First, all requests must be submitted within 100 days of delivery. But, before initiating a return, we ask that you sleep on it for at least 30 days so you can adjust to the new mattress or frame. If, after this period, you are still not satisfied with your purchase, you may initiate a return here.

  • This warranty covers any defects in the materials or workmanship. The following exceptions will void the warranty: excessive wear and tear, stains, misuse or improper care, alteration or repair by unauthorized representatives, damage resulting from transit or handling, or commercial use. Visit our warranty page for full details on what each warranty covers.Β 

  • Yes, we offer financing through Affirm. Select Shop Pay Installments at checkout, then enter a few pieces of info for a real-time decision. Pick the payment plan you like bestβ€”from 4 interest-free payments every 2 weeks to monthly payments up to 24 months. You’ll never pay more than you agree to up front. Make payments at affirm.com or in the Affirm app. You’ll get email and text reminders. See ourΒ financing pageΒ for more details.

  • Mattresses are covered for 10 years under the Guardsman Protection Plan.

  • The plan covers accidental household damage including stains, rips, cuts, punctures, and burns. These incidents must be caused by an accident or sudden event.

  • No. Unlike our manufacturer warranty, the Guardsman Protection Plan does not require a mattress protector for coverage

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