Free delivery across the USA◦Available on Amazon Prime◦30-day free returns◦Rated 4.9 / 5 · 3,200+ reviews◦Code SAVE10 — 10% off over $199◦

How to Make a Small Room Look Bigger with a Wall Mirror (5 Designer Techniques)

Interior designers use these 5 mirror placement techniques to visually double the size of small rooms — from studios to primary bedrooms.

Small American apartment with large window pane wall mirror making the space feel larger
Quick answer

The most effective single move: hang a large wall mirror directly opposite your biggest window. It reflects the outdoor light and creates the illusion of a second window, adding perceived depth and doubling ambient brightness.

The physics of it are simple: a mirror reflects roughly 90% of the light that hits it. Hang one in the right place and a small room instantly reads as bigger, brighter, and more expensive. Here are the five techniques designers use most.

1. The opposite-window trick

Position a large wall mirror on the wall directly across from your biggest window. The mirror will reflect the outdoor light and — critically — the outdoor view, creating the illusion of a second window. In a 10×12 studio, this single move can make the room feel like a 12×14.

Best mirror shapes for this: arched or window pane, because their proportions match a real window.

2. Go bigger than feels comfortable

The single most common mistake in small-space design is choosing a mirror that's too small. A postage-stamp mirror on a big wall looks lonely; a 48-inch mirror on the same wall looks intentional. When in doubt, go one size up.

3. Lean, don't hang

A floor-length arched mirror (70×30 or bigger) simply leaned against the wall reads as designer, not lazy. It also visually adds vertical height to the room. Just bracket it to the wall at the top edge for earthquake/child safety — takes 30 seconds.

Instead of a single mirror, combine one medium arched mirror with 3–4 framed prints in a loose grid. The mirror reflects the art and multiplies visual interest — great for narrow hallways.

5. Multiple mirrors as light multipliers

In genuinely dark rooms (basement bedrooms, north-facing kitchens), place one mirror opposite each artificial light source. The compounding reflections can lift ambient brightness by 30–40% with zero electrical work.

Rule of thumb: the total mirror area in a small room should equal roughly 15–20% of the total wall area for maximum brightening effect.

Our arched and window pane wall mirrors are designed with exactly these small-space use cases in mind. Free USA delivery, 30-day returns.

Frequently asked questions

Where should I hang a mirror to make a room look bigger?

Hang it on the wall directly opposite your largest window. The mirror will reflect the outdoor light and view, creating the illusion of a second window and effectively doubling the room's perceived depth.

What size mirror do I need for a small apartment?

Bigger than you'd think. For a studio or small bedroom, aim for a wall mirror at least 40 inches tall. In small spaces, over-scaling the mirror reads as intentional and dramatically increases the sense of space.

Do mirrors actually make rooms brighter?

Yes. Mirrors reflect about 90% of the light that hits them. Placed opposite a window or lamp, a large wall mirror can noticeably lift the ambient brightness of a room without adding a single watt of electricity.

Can I lean a mirror instead of hanging it?

Absolutely — leaning a floor-length arched mirror against the wall is a popular designer look. For safety, secure the top edge to a stud with a simple L-bracket so it can't tip forward.

Sources & further reading

  1. How to Make a Small Room Look Bigger — HGTV
  2. How Mirrors Manipulate Perception of Space — Architectural Digest
  3. Interior Design Trends — Elle Decor

Next reads

Matte black arched windowpane mirror with a fan-spoke top and three-by-three grid hung a hand's width above a walnut dresser in a warm American home, with a woven tray and linen towel on the dresser, a doorway to a lamp-lit living room and a reflection of a curtained window, a cream armchair and a glowing table lamp

How High to Hang a Mirror: Height Chart for Every Room, With Real Examples

Matte black arched windowpane mirror with a fan-spoke top and three-by-three grid hung above a low walnut credenza in a warm American living room, with a brass floor lamp, a camel leather armchair and an opened shipping box beside it, reflecting a sheer-curtained window, a table lamp and a cream chair

Black Friday Mirror Deals: What to Check Before You Buy a Wall Mirror

Matte black arched windowpane mirror with a fan-spoke top and three-column grid hung above a walnut entry console with a linen runner and small white and orange pumpkins, a woven basket with a plaid throw below, in a Thanksgiving foyer beside a doorway to a candlelit dining room, reflecting a table set for Thanksgiving

Thanksgiving Entryway Decor: How to Style Your Entry Table and Mirror for Holiday Guests