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.
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 Other room categories include the balcony rooms, an atrium king (without a view), and the bunkhouse–individual hostel-style rooms with twin-size beds and shared amenities for solo travelers. Ryan Slattery, Travel + Leisure, 2 Sep. 2024 The couple’s children — then ages 2 and 6 — shared a room barely big enough to fit a crib and a twin-size bed. Rukmini Callimachi, New York Times, 2 June 2024 One worker said he was assigned a closet that was barely large enough for a twin-size mattress. Melissa Sanchez, ProPublica, 27 Feb. 2024 However, futons offer bed sizes ranging from those similar to a twin-size bed, full-size bed, or even a queen bed. Jenna Clark, Better Homes & Gardens, 28 Feb. 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 24 Apr. 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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