How this size fits
The diameter should be compared with the vanity or furniture width and with the open wall area around sconces, shelving, trim and nearby doors.
Made to the stated size
A custom 40-inch mirror
Centennial Glass can fabricate a frameless mirror to these exact dimensions, finish the exposed edges, add safety backing where appropriate, and arrange professional installation. Framed round mirrors are available as completed designs in the ready-made collection. Practical material, access and mounting requirements are confirmed before fabrication.
Orientation and proportion
A custom frameless circle is measured by its glass diameter. A ready-made framed mirror may extend beyond a 40-inch reflective area, so confirm the finished outside size.
Mirror size or finished size?
For custom fabrication, 40″ diameter describes the frameless glass itself. A ready-made framed product is listed by its completed product dimensions, which may include the frame.
Measure around the installation
Account for the vanity, faucet, backsplash, lighting, switches, outlets, trim and available mounting surface—not only the open wall width.
Two ways to choose
Custom frameless or ready-made framed
Choose exact frameless fabrication when the dimensions lead the project, or browse the ready-made collection for a factory-framed round mirror with a completed profile and finish.
Ready-Made 40-inch Round Mirrors
Bern
40" W × 40" H × 0.5" D View mirror →
Cori
40" diameter × 0.5" D View mirror →
Floresta
40" W × 40" H × 3" D View mirror →
Knox
40" diameter × 0.5" D View mirror →
Noto
40" W × 40" H × 1.25" D View mirror →
Olica
40" W × 40" H × 1" D View mirror →
Oltimo
40" W × 40" H × 0.87" D View mirror →
Osorno
40" W × 40" H × 0.4" D View mirror →
Reave
40" W × 40" H × 3" D View mirror →
Scion
40" W × 40" H × 0.4" D View mirror →
These collection products match the nominal dimensions in their source specifications. Open a product to check its complete finished dimensions and details.
Ready-Made Mirrors Close to 40-inch
Aver
39.5" diameter × 0.75" D View mirror →
Timo
40.5" diameter × 2" D View mirror →
Andromeda
42" diameter × 1" D View mirror →
Goldie
39.5" W × 42" H × 1.25" D View mirror →
Apia
36" diameter View mirror →
Bassett
36" diameter × 3.5" D View mirror →
Cabiria
36" diameter × 1.2" D View mirror →
Canna
36" diameter × 1.2" D View mirror →
Nearby alternatives are not represented as the same size. Their actual catalogue dimensions are shown on each card.
40-inch Round Mirrors FAQ
Can Centennial make an exact 40-inch round mirror?
Yes. Centennial can fabricate this size as a custom frameless mirror, subject to final confirmation of the measurements, edge finish and installation conditions.
Can this mirror be custom framed?
This shape is custom fabricated as a frameless mirror. For a framed version, browse ready-made designs and compare their completed outside dimensions.
What should I measure before ordering?
Measure the wall and every nearby constraint, including lighting, outlets, switches, faucets, backsplashes, trim and the route into the room.
Are there ready-made mirrors close to this size?
The page identifies exact catalogue matches when available and clearly labels nearby alternatives with their actual dimensions. Visit the showroom to compare the collection in person.
Compare dimensions
Other popular round mirrors sizes
Compare the options
Visit our showroom to browse the collection
See ready-made proportions and frame finishes in person, or bring the project measurements to discuss a custom 40-inch mirror.