Round Convex Clock Glass – Sizes 18″ and 18-3/8″ – Choose Size

This round convex clock glass is available in extra-large sizes 18″ to 18-3/8″ in diameter, ideal for oversized gallery clocks, tower clocks, or custom-built timepieces. Each piece features a gently domed profile and is approximately 1.7 to 2mm thick, offering a traditional look with added character.

This particular glass is hand-blown and features natural characteristics such as tiny air bubbles (“seeds”), chill lines, and light surface imperfections. Some pieces may show minor scratches only visible under bright light—these are not defects but rather typical traits of handmade glass. The absence of joining seams and the artisanal quality give this glass a unique, authentic appearance, perfect for antique restorations or vintage-inspired designs.

Helpful Hints:
Due to variations in bezel styles and tolerances, we recommend choosing a glass that is 1/16″ to 1/8″ smaller than the inner diameter of your bezel. Measure directly across the center where the edge of the glass will rest to ensure a proper fit.

QUANTITY DISCOUNTS ARE AVAILABLE FOR THIS ITEM. PLEASE SEE THE TABLE BELOW.

Product Details
Type: Round convex clock glass (hand-blown style)
Available Sizes: 18″ and 18-3/8″ (464mm to 467mm)
Thickness: Approx. 1.7mm to 2mm
Material: Glass
Finish: Clear convex, handmade
Condition: New item with natural glass imperfections
Selection: Choose size from drop down menu
Intended Use: For extra-large clocks, vintage restorations, or custom designs

Features & Uses
Oversized Fit: Made for large gallery and tower-style clock bezels
Artisan Quality: Hand-blown glass with natural characteristics such as seeds and chill lines
Domed Profile: Traditional convex shape enhances vintage style
Subtle Imperfections: Minor scratches and bubbles visible only under bright light
Authentic Appearance: No seams; ideal for restorations and period-accurate projects
Bulk Savings: Quantity discounts available for larger orders