Octagon Glass Cut to Size
Octagon Glass Cut to Size
Octagon glass is set by one number: the diameter from tip to tip, measured across two opposite corners. Enter it, pick a material, and the quoter prices the piece right away.
Eight-sided glass is common in octagon windows and frames, clock faces, small tabletops, display bases, terrariums and stained glass backers.
Measuring: measure from one corner straight across to the opposite corner. If you only know the flat-to-flat width, divide it by 0.924 to get the tip-to-tip size.
Materials: clear glass, frosted glass, mirror, borosilicate, polycarbonate and acrylic.
How it's cut: CNC cut (laser, waterjet, and more) to ±0.015″. We don't cut tempered glass, and edges are left as cut, without polishing or bevels.
Other regular shapes in the same family: hexagon, heptagon and pentagon.
What you enter: Diameter (tip to tip). Pick inches or mm in the quoter.
Size: Glass and polycarbonate go up to 18″ × 12″ (2 mm clear glass is 9″ × 7″), borosilicate up to 12″ × 12″, and acrylic up to 32.5″ × 32.5″. The quoter shows the exact limit for each material.
FAQ
How do I measure an octagon?
Measure tip to tip, from one corner to the opposite corner.
I only have the flat-to-flat size. What do I enter?
Divide the flat-to-flat size by 0.924 and enter that.
Can you cut an octagon mirror?
Yes. Choose mirror glass.
Do you cut tempered glass?
No.
How fast does it ship?
Most orders ship in 1 week.
Related
Need help before you order?
Which material should I pick?
Full comparison on our Materials Guide.
- Everyday shelves & tabletops → Clear Glass
- Privacy or diffused light → Frosted Glass
- Reflective surface → Mirror Glass
- Thermal shock, high heat, or chemical resistance → Borosilicate Glass
- Impact resistance / tough clear panels → Polycarbonate
We do not cut tempered glass. Need something else? Email cancutglass@gmail.com.
We CNC cut (laser, waterjet, and more) to ±0.015″. Glass and polycarbonate go up to 18″ × 12″ (borosilicate up to 12″ × 12″); acrylic goes up to 32.5″ × 32.5″. Ships in 1 week.
How to measure
- Measure the finished cut size you need — not the rough stock.
- Rectangles: length × width. Circles: diameter across the widest point.
- Pick thickness in the quoter.
- Use inches.
- Fully custom shape? Use the glass builder or upload a DXF there.
Full guide: Measuring Guide. Materials: Materials Guide.