So I keep seeing SD listed on sofas—what is seat depth, and what’s a good number for everyday use?
On a sofa, "seat depth" refers to the distance from the front edge of the seat to the innermost point of the backrest—essentially, the length that supports your hips to your knees when you sit down.
Generally speaking, sofas with a seat depth between 21 and 24 inches (approximately 53 to 61 centimeters) are the most common and are suitable for most adults.
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