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  • Oval Convex Glass
  • Convex Glass - Side View
  • Convex Glass - Side View

Oval Convex Glass #900A


We carry convex glass also known as bubble glass or domed glass in many antique sizes and shapes along with their modern equivalents. Convex glass here is pictured in a #457 Oval Vintage Walnut Frame.  Although convex glass will fit frames we sell they are most commonly ordered with our Vintage Collection frames. 

Measuring Convex Glass

Like flat glass, convex bubble glass is measured length and width directly across the glass (not around the bend of the glass). Most of our convex glass has a depth of 3/4" to 1", but deeper bends are possible

One of the most popular sizes we sell is the oval 13 1/2" x 19 5/8". Many people think these odd antique sizes are no longer available, but we stock many of these unusual antique sizes with no custom set up fee required. 

We currently stock over 50 standard sizes of convex glass and we also custom bend any size of convex bubble glass up to 22"x28". A paper tracing of the custom bend is required.  The glass will be cut to the line drawn on the paper template. To produce your custom size convex glass allow 3-4 weeks delivery after we receive the tracing.

Uses of Convex Glass

Most bubble glass or convex glass is used to cover old antique portraits in which the photographs were convex. We sell convex glass replacements to fit actual antique frames, to replace broken pieces in clocks, gauges and other instruments, as well as to fit our own antique replica frames. 

The Process of Bending Glass

Flat glass is laid into frame molds. The glass is then heated to temperatures that allows the glass to slump. Longer heat creates a deeper bend thus creating what is know as bubble glass or convex glass.  


In the late 1800's up to about 1940, over half of the picture frames produced in America by some the largest picture frame factories were oval, round, or antique octagon. By comparison less than 5% of all picture frames produced today are oval. A large number of these old frames were family portraits that were covered with convex glass. Many attics and basements are home to these family heirlooms framed in antique frames and often with a cracked piece of convex bubble glass.  

Acrylic Domes or Deep Convex Glass?

Convex glass normally has a bend of about 3/4" to 1”. For items that have a depth more than a photo or canvas, you may consider our acrylic domes which fit all our frames and range in depth from 2.5" up to 7".

Other Details

Convex Glass

Product Reviews

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  1. I can only say I am impressed!

    Posted by Margo Giunta on 5th Apr 2019

    My 16 x 20 convex glass arrived in perfect condition and on time! It's actually much lighter than I expected it to be. This item was package so carefully there was just no way it could break enroute! Thank you inlineovals for helping me restore a treasured item!

  2. Fit great and looks perfect!

    Posted by Art Rice on 7th Jun 2018

    Beautiful piece of glass that the customer loved!
    Thank you!

  3. Beautiful!

    Posted by Lincoln Watase on 3rd Mar 2017

    Convex glass with an oval frame for portraits of my parents came out classically beautiful.

  4. Perfect fit for an antique frame and photograph

    Posted by Bryan & Devan Conservation on 24th Feb 2017

    As a conservation business, we have many clients that bring us convex photograph portraits in need of conservation and restoration. Antique convex glass is often very difficult to find, and the convex glass that InLine Ovals offers is a great option for replacement of broken or missing glass in convex oval portraits and frames. In this case, the curve of the photograph was a perfect fit to the the curve of the glass.

  5. Broken

    Posted by Unknown on 8th Sep 2016

    Perfect size; very nice glass; however, it arrived broken/damaged in shipment.

  6. Only source I know of, but...

    Posted by David Anderson on 17th Aug 2016

    I don't need convex glass often, but Inline is the only source I know of, and it's expensive. The problem if you're trying to replace original glass for a print that's also convex, the curve is not as deep and the print will touch the glass. That's not good.

  7. Just what I wanted

    Posted by Renee on 28th Apr 2016

    The glass was perfect. It fit the frame exactly. I would order this again if needed.

  8. Happy to find the product that I was looking for

    Posted by Unknown on 10th Feb 2016

    The glass was perfect for my project.