I have been working with glass for over three decades — it is the family trade, going back three generations to my uncles, cousins, and father. And one of the most common calls we get at LA Glass goes something like this: “I want a mirror for this wall, but I have no idea what size, what kind of glass, or how it should be mounted.”

Custom mirrors are one of those design elements that can completely transform a room — they reflect light, create the illusion of space, and serve as functional art. But most people do not know where to start when ordering one. Here is what you need to know, broken down into the decisions that actually matter.

What Type of Custom Mirror Do You Need?

Not all mirrors are the same piece of glass on a wall. The type determines the glass, the mounting system, and the overall look.

Wall Mirrors The most common custom request. These can be frameless with polished edges for a clean, modern look or framed with custom molding. Wall mirrors go in living rooms, hallways, entryways, and above fireplaces. The key question is whether you want the mirror to float on the wall (frameless, standoff mounted) or sit inside a frame (traditional).

Bathroom Mirrors Bathroom mirrors need to handle humidity. Standard silver-backed mirror glass works fine in most bathrooms, but for steam-heavy bathrooms without good ventilation, we sometimes recommend a protective backing or consider a slight upgrade in glass quality. Sizing matters — a mirror that is too small looks incomplete, while one that is too large can overwhelm the vanity.

Home Gym Mirrors Gym mirrors are workhorses. They need to be large, durable, and mounted to handle impact — not that people will be throwing weights at the wall, but they will be moving equipment around it. Gym mirrors are typically 1/4” or 1/2” thick, installed with J-channel or heavy-duty clips, and often run floor-to-ceiling and wall-to-wall for the full studio look.

Sliding Door and Wardrobe Mirrors Mirror-faced sliding closet doors are popular in LA apartments and condos where space is at a premium. These require specific mounting hardware and track systems. The glass is typically 3/16” or 1/4” and must be tempered for safety.

Decorative Mirrors Asymmetrical shapes, beveled edges, antiqued finishes — decorative mirrors are statement pieces. These are the most custom-intensive projects and benefit the most from working directly with a glass company that can fabricate to exact specifications rather than ordering from a catalog.

How to Size a Custom Mirror

The number one sizing mistake? Going too small. A mirror should be proportional to the wall it is on and the furniture it relates to.

Above a vanity or console table: the mirror should be 2 to 4 inches narrower than the table on each side. A 48-inch console table calls for a 40- to 44-inch wide mirror.

Above a fireplace mantel: the mirror should be slightly narrower than the mantel width — typically 6 to 12 inches narrower total. A 60-inch mantel works well with a 48- to 54-inch mirror.

Full-length wall mirror: in a hallway or bedroom, a full-length mirror should extend from roughly 6 inches above the floor to at least 6 feet high. Standard full-length dimensions are 24” to 36” wide by 60” to 72” tall.

Gym wall mirror: the goal is usually to cover the entire wall. Standard gym mirrors are 48” to 60” wide panels installed edge-to-edge. Height is usually 72” (6 feet) to cover the full wall above wainscoting or baseboard.

Across an entire wall: some clients want a single, massive mirror spanning an entire accent wall. This is technically possible but presents challenges — a mirror larger than about 84” in any dimension becomes difficult to transport, requires reinforced wall mounting, and the glass alone can weigh over 200 pounds. In these cases, we often recommend two or three panels with minimal seams.

Glass Thickness Options

Mirror glass thickness affects appearance, mounting requirements, and safety:

For most residential wall mirrors, 1/4” glass provides the right balance of quality, weight, and cost. We only recommend going thicker for mirrors over 84” in any dimension, gym applications, or commercial spaces.

Edge Profiles Explained

The edge treatment on a frameless mirror is what gives it a finished, professional look. The four main options:

Flat Polish (Pencil Edge) A clean, slightly rounded edge. This is the standard edge for most custom mirrors. It is smooth to the touch, looks clean but understated, and works with any design style. Think of it as the default option — it never looks wrong.

Beveled Edge A angled cut around the perimeter of the mirror, typically 1” to 1-1/2” wide. Bevels catch and reflect light, creating a prismatic effect at the edge. Beveled mirrors have a more traditional, elegant look. They work especially well above fireplaces, in formal dining rooms, and in spaces where the mirror is a focal point rather than a functional piece.

Flat Ground Edge A perfectly flat, matte edge with no rounding. This is a more architectural, modern look. Flat ground edges have a frosted appearance at the edge and pair well with minimalist and contemporary interiors.

Ogee Edge A decorative curved profile — think of the S-curve on classic furniture. Ogee edges are for statement mirrors where the edge itself is part of the design. This is the most labor-intensive edge treatment and costs more, but on the right mirror in the right room, the effect is worth it.

Mounting Methods — How the Mirror Stays on the Wall

The mounting method should be chosen based on mirror size, weight, wall surface, and whether the mirror will ever need to be removed.

Mirror Adhesive (Glue) For mirrors up to about 36” x 60” on clean, flat drywall, mirror mastic is the cleanest mounting method. The mirror sits nearly flush to the wall with no visible hardware. The catch: once glued, the mirror is permanent. Removing a glued mirror usually destroys the drywall behind it and often breaks the mirror. Only use glue if you are certain this is the permanent location.

J-Channel A metal channel mounted to the wall that the mirror sits inside. J-channel is the go-to for gym mirrors and any installation where multiple panels need to align perfectly edge-to-edge. The bottom channel carries the weight; the top and side channels hold the mirror in place. J-channel allows for mirror replacement if a panel ever gets damaged.

Mirror Clips Small metal or plastic clips screwed into the wall that grip the mirror edge. Clips are visible (unlike glue) but allow for removal. They work for mirrors of any size when properly placed. For heavy mirrors, clips should be placed at the bottom edge to carry weight, with side and top clips providing stability.

French Cleats For very heavy mirrors — 100+ pounds — a French cleat system is the safest mounting method. A metal or wood cleat is mounted to the wall studs, and a matching cleat is attached to the mirror backing. The mirror hooks onto the wall cleat and hangs securely. This method is used for oversized, thick mirrors and commercial installations.

Standoffs Metal posts that hold the mirror off the wall by 1” to 2”. Standoffs create a floating effect — the mirror appears to hover. This is a modern, architectural look popular in contemporary LA homes. Standoffs require precise drilling and are best left to professionals.

Why Professional Installation Matters

A custom mirror is heavy. A 48” x 72” mirror at 1/4” thick weighs approximately 85 pounds. A 60” x 84” mirror at 3/8” thick weighs over 150 pounds. Getting it onto the wall safely, level, and securely mounted is not a DIY project for most homeowners.

At LA Glass, we have installed thousands of custom mirrors across Los Angeles, Orange County, and the San Fernando Valley since 2008. We are a 3rd generation glass glazier — mirror installation is in our family blood. We handle everything from measurement to fabrication to wall preparation to final mounting.

And we do it all with what my father taught me: a servant’s attitude. Our job is to serve our customers. Every mirror we hang, we treat like it is going in our own home.

REQUEST QUOTE NOW! — LA Glass serves Los Angeles, Orange County, and the San Fernando Valley. (323) 366-4202

FAQ

Q: How do I clean a custom mirror without streaks? A: Use a microfiber cloth with a mixture of 50% distilled white vinegar and 50% water, or a dedicated ammonia-free glass cleaner. Never spray cleaner directly on the mirror edge — overspray can seep behind the silver backing and cause edge corrosion (black spots). Spray the cloth, not the glass. Avoid ammonia-based cleaners on mirrors with protective backing.

Q: Can I put a custom mirror in a bathroom with a shower? A: Yes, but with considerations. Standard mirror glass handles bathroom humidity fine in most cases. For steam-heavy bathrooms (small bathrooms with poor ventilation), consider a mirror with an anti-corrosion backing or ensure the bathroom fan runs during and after showers. Avoid placing mirrors where they will be directly splashed with water.

Q: How long does custom mirror fabrication take? A: Standard custom mirrors are typically fabricated within 5 to 10 business days, depending on size and edge complexity. Beveled edges and custom shapes add 2-3 days. Installation is usually same-day once the mirror arrives. Large commercial orders or multi-mirror projects may take 2-3 weeks.

Q: How much does a custom mirror cost? A: A standard 36” x 48” wall mirror with a flat polish edge typically costs $300 to $600 installed. Larger mirrors, thicker glass, beveled edges, and complex mounting systems increase the price. A full gym mirror wall (8’ x 12’, multiple panels) typically runs $1,500 to $3,500 installed. Every mirror is quoted based on your exact specifications — call for a firm quote.

Q: Can you make a mirror in a custom shape? A: Absolutely. Circles, ovals, arches, asymmetrical shapes — custom shapes are one of the main reasons clients come to LA Glass instead of buying off-the-shelf. Custom shapes require CNC cutting and more labor-intensive edge finishing, so they cost more than rectangular mirrors, but the result is a one-of-a-kind piece.