US, of a bed : having dimensions of 39 by 75 inches (about 1.0 by 1.9 meters)
also : of a size that fits a twin-size bed
twin-size sheets
compare full-size, king-size, queen-size

Examples of twin-size in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Sleep in Heavenly Peace received $7,500 to provide twin-size beds to children in need ages 3-17 who otherwise might sleep on the floor. Linda McIntosh, San Diego Union-Tribune, 19 June 2025 For smaller beds, grab a twin-size for $28 on sale. Mariana Best, Better Homes & Gardens, 15 June 2025 The hotel is fully accessible and has 14 accessible rooms (including twin-size beds and queen-size bed options) that offer roll-in and transfer showers, visual alarms, and closed captions on TVs. Stacey Leasca, Travel + Leisure, 28 May 2025 Use it as a twin-size bed or two, sofa, or pop the trundle bed to create a king-size bed in a guest room. Blake Bakkila, Architectural Digest, 21 Apr. 2025 The glamping site offers heated mattresses on the king, queen, or twin-size beds, woodstoves or space heaters indoors, covered patio spaces, firewood delivered each night, and a store stocked with hot chocolate and other goodies. Jim Dobson, Forbes.com, 9 Apr. 2025 The twin-size Premier Hybrid is the only size currently $100 less, but the queen starts at a respectable $999, while the king starts at $1,199. Christopher Murray, FOXNews.com, 4 Apr. 2025 This twin-size comes with a hands-free electric pump, simply twist it and watch the air mattress inflate. Rylee Johnston, Travel + Leisure, 19 Mar. 2025 Not long after, following nine months of bonding – sharing a twin-size bed and spending every second of the day together – the soldier learned he was being reassigned to Joint Base San Antonio-Lackland in Texas. Dawn Sawyer, CNN, 28 Nov. 2024

Word History

Etymology

twin bed

First Known Use

1926, in the meaning defined above

Time Traveler
The first known use of twin-size was in 1926

Browse Nearby Words

Cite this Entry

“Twin-size.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/twin-size. Accessed 28 Jun. 2025.

Kids Definition

twin-size

adjective
ˈtwin-ˌsīz
: having a size of 39 inches by 75 inches (about 1.0 by 1.9 meters)
a twin-size bed
Last Updated: - Updated example sentences
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