Home & Decor

How big, how high, will it fit? Measurement-led guides for mirrors, furniture and decor in real US rooms.

Most decor mistakes aren't about taste. They're about inches: a mirror that's wider than the vanity, a sofa that's perfect in the showroom and stuck at the front door. The guides in this section start with the measurement that decides the outcome, then explain the rule of thumb behind it and where that rule comes from. When two sources disagree, we show both and do the math so you can choose. You won't find mood boards or "10 ideas" lists here. You'll find what to measure, where to hold the tape, and a clear note on who should skip a piece altogether. Grab a tape measure and a pencil before you start.

Guides in Home & Decor

What Size Mirror Goes Over a Vanity? Chart by Width

Mirror widths for 24- to 72-inch vanities, one mirror or two, and how high to hang it.

Will Your Couch Fit Through the Door?

Measure doors, halls and stairs before delivery, with the diagonal-depth check.

Sofa Dimensions: Standard Couch Sizes in Inches

Loveseat, 3-seater and sectional sizes, seat height and depth, and the clearance your room needs.

Curtain Length Guide: 63, 84, 96 or 108 Inches?

Which length to buy, where to hang the rod, and how wide the panels should be.

Mattress Sizes Chart and the Room Each Bed Needs

Twin to California king in inches, the smallest room for each, and walkway space.

Before any home & decor purchase

Measure the path, not just the spot

The room may fit; the hallway may not.

Write numbers down in inches

US listings and delivery teams work in inches; 1 inch = 2.54 cm.

Include what sticks out

Door stops, trim, handrails and faucets all change the usable space.

The three numbers to write down first

Measure	Where to hold the tape	Why it matters
Width of what's underneath	Outer edge to outer edge of the vanity, console or wall space	A mirror or piece of decor should be narrower than what sits below it. See What Size Mirror Goes Over a Vanity?
Clear door width	Between the door stops with the door fully open, not frame to frame	Delivery fails at the narrowest point. See Will Your Couch Fit Through the Door?
Ceiling and stair clearance	The lowest point on the route: a light fixture, a stair landing, the ceiling before a turn	A couch tipped on its end needs height as well as width

Common questions

How wide should a mirror be compared with the vanity?

Narrower than the vanity, never wider. Wayfair's guide puts the mirror 2 to 4 inches in from each edge, so a 36-inch vanity takes a 28- to 32-inch mirror. The mirror guide has the chart for 24- to 72-inch vanities.

Do I measure the door frame or the opening?

The opening. Open the door all the way and measure between the door stops, because the stops and the door itself take up space. Our couch guide walks through each opening on the route.

Should I measure in inches or centimeters?

Inches. US listings and delivery teams use them. If your tape is metric, divide centimeters by 2.54.