Used with a noun in requesting further information about the identity or categorization of something b.. (used interrogatively as a request for specific information):
:max_bytes(150000):strip_icc()/living-room-area-rugs-1977221-e10e92b074244eb38400fecb3a77516c.png "The Ultimate Rug Size Guide")
:max_bytes(150000):strip_icc()/best-rug-size-for-living-room-sectional-7152758-748d764d4a6e45938c2bec821930b231.png "What Size Rug Is Best for Your Living Room Sectional?")
Used to ask for information about people or things:. How to use what in a sentence.