2.5mm thick watch crystals mineral glass FLAT glasses 27mm - 29.9mm crystal part

Extra-thick 2.5mm flat mineral glass watch crystal, available in diameters from 27mm to 29.9mm.

⭐ At a glance

📏 Diameter range: 27mm–29.9mm (choose your exact size)

✅ Flat profile, 2.5mm thick mineral glass

✔️ Clear, unbranded replacement crystal

Colour: Clear

✅ Fits

Fits any watch case taking a flat mineral crystal within the 27mm–29.9mm diameter range — select the size that matches your old glass or case opening. For diameters outside this range, please see our other listings.

⚠️ Please check your case's crystal seat measures accurately before ordering, as mineral glass needs a close, snug fit — even 0.2mm–0.3mm out can stop it seating correctly.