Definition and Meaning of Full‑Size: Common Usage and Dimensions

Definition of Full‑Size

The term full‑size refers to something that has the standard or typical dimensions expected for its category.

General Meaning

A full‑size object is one built or designed to match the normal size in its group or category.

Example: A full‑size keyboard includes all standard keys without reducing key spacing or layout.

U.S. Usage for Beds

In American English, a full‑size bed describes a mattress measuring 54 by 75 inches (approximately 1.4 by 1.9 meters). It sits between a twin and a queen bed in size, providing space suitable for one adult or two people in close quarters.


Author Summary

This entry defines full‑size as the standard or expected size within its type, illustrated by the classic 54×75‑inch full‑size bed.

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Merriam-Webster Merriam-Webster — 2025-11-25

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