Fusing Mold: Drop Ring OR Coaster Mold:
Outer Lip: 1 1/8 inch (28.58mm)
Diameter: 5 inches (127 mm)
Center Opening:  2 3/4 inch (44.45mm)

See Free Proejct Here

Just set it right on your kiln shelf and slow slump a round circle over it to create a Glass Coaster.

Or, Use it for a Drop Ring Vase.  This ceramic Mold is easy to use. Make you should always elevate molds for proper air circulation. Smooth surface, accepts kiln wash uniformly, and will not crack under repeated usage when handled properly. Individual molds may have slight variations in dimensions as shown. Note: As a Drop Ring, always elevate molds with kiln posts for good circulation.