Octagon Convex Glass #900T

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Octagon Convex Glass on this page only - to order a Frame & Glass together select your frame first.
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  • Octagon Convex Glass
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 Product Description

We have been bending and fitting antique replica convex glass (also known as bubble glass or domed glass) since the early 1970’s, and we currently stock most antique sizes and shapes along with their modern equivalents. Although antique octagon convex glass is most popular with our Vintage Collection of frames, our convex bubble glass will fit any frame we make.

Measuring Convex Glass

Octagon Convex bubble glass is measured just like octagon flat glass, measuring length and width directly across the glass (not around the bend of the glass). Octagon convex glass generally has a depth of between 3/4" to 1" although deeper bends are possible. The most popular sizes often seem unusual such as the oval 13 1/2" x 19 5/8". Many people are concerned that these odd sizes are no longer available or will require custom bending fees. However, we stock many of these unusual antique sizes, and most often no custom set up fees are required.

Although we stock 4 standard sizes of octagon convex glass, we also custom bend any size of convex bubble glass up to 11 3/4" x 19 15/16". Each custom bend requires a paper tracing of the size required. The line you draw will be the line the glass is cut to. You will need to allow 3-4 weeks delivery after we receiving the tracing to produce your custom size convex glass.


Although oval picture frames make up less than 5% of all picture frames produced today, this has not always been the case. Over half of the picture frames produced in America by some the largest picture frame factories in the late 1800's up to about 1940 were oval picture frames, round picture frames, or antique octagon picture frames. A large percentage of these frames were used to frame family portraits with convex glass. Today many attics and basements are home to these family heirlooms framed in antique frames and often broken convex bubble glass.

Victorian Frame Company has a long history of bending convex glass replacements for these images. Our glass bending started in the early 1970’s and today we continue to manufacture convex glass along with a unique collection of antique replica frames. See our Vintage Collection of frames.

Uses of Convex Glass

Most octagon convex glass is used to cover antique portraits in which the photographs themselves were also convex. We produce convex glass to fit our own antique replica frames, and also can supply an octagon convex glass replacement to fit actual antique frames. We also regularly produce convex glass replacements to replace broken pieces in clocks, gauges and other instruments.

The Bending Process

Convex Glass is made by laying flat glass into frame molds and heating the glass to temperatures that allow the glass to slump. Longer heat creates a deeper bend. 

Deep Convex Glass or Acrylic Domes?

Octagon convex glass normally has a bend of about 3/4" to 1”. If you are displaying an item that has more depth than a photo or canvas, then you may consider using our octagon acrylic domes which fit all our frames and range in depth from 2.5" up to 7". To view our acrylic domes click here.


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Additional Information

Convex Glass
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19 Reviews

  • 5
    Convex glass

    Posted by Michael grantham on 25th Mar 2023

    So glad to find this glass and restore a 100 year old frame back to glory. Great staff and good price.

  • 5
    I was very satified with the order. Fit just fine.

    Posted by Larry Dunnington on 6th May 2022

    I will order again when I need a another frame glass.

  • 4
    Perfect fit

    Posted by Cynthia Callahan on 8th Feb 2022

    Fast service

  • 5
    Octagon Convex glass 900 T

    Posted by Anthony Shields on 14th Dec 2020

    Nice pieces made my wife happy to get the glass back in her grandpa’s picture frame

  • 5
    Convex Glass

    Posted by Kim Schindel on 8th Jun 2020

    Fits my antique frame Perfectly!

  • 5
    Great response and customer Service!

    Posted by Michelene Westbrook on 2nd May 2019

    Sadly I accidentally broke the convex glass on a family treasure. A picture of my Dad Las he enlisted into WWII. He passed away last year, and Sherry worked with me to get the right size glass to fit the frame!

  • 5

    Posted by patrick hurley on 16th Apr 2019

    Fit a 100 year old picture and frame perfect

  • 5
    Perfect fit

    Posted by Unknown on 1st Apr 2019

    My wife broke the glass in her great grandmother's picture frame and we were at a loss. We ordered the bubble glass and it was a perfect fit and looked like the original.

  • 5
    Perfect match!

    Posted by Unknown on 16th Sep 2018

    Beautifully crafted. Very happy!

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