- (of a bed) approximately 39 inches (99 cm) wide and between 75 and 76 inches (191 and 193 cm) long; single.
- pertaining to or made for a twin-size bed: twin-size sheets.
Origin of twin-size
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for twin-size
The mother carries what looks like a twin-size cotton futon mattress.Whatever You Do Someone Will Die. A Short Story About Impossible Choices in Iraq
Nathan Bradley Bethea
August 31, 2014