An apparatus for precision roll forming and texturing glass or glass-ceramic sheets including: a glass feed device for supplying a supplied stream of molten glass or glass-ceramic; a pair of forming rolls (14, 16) maintained at a surface temperature of 500° C or higher, the forming rolls being spaced closely adjacent each other defining a glass forming gap between the forming rolls with the glass forming gap located vertically below the glass feed device for receiving the supplied stream of molten glass and thinning the supplied stream of molten glass between the forming rolls to form a formed glass ribbon having a formed thickness; a pair of sizing rolls (24, 26) maintained at a surface temperature of 400° C or lower, at least one of the sizing rolls having a textured surface, the sizing rolls being spaced closely adjacent each other defining a glass sizing gap between the sizing rolls with the glass sizing gap located vertically below the forming rolls for receiving the formed glass ribbon and thinning and imparting texture to the formed glass ribbon to produce a sized glass ribbon having a desired thickness, a desired thickness uniformity, and a desired texture on at least one surface of the glass ribbon; wherein each of the sizing rolls comprises an insulating cylinder having an outer glass sizing surface, characterized in that the sizing rolls further comprise a first pair of spacer rings mounted at each end of insulating cylinder of the first of the sizing rolls, and a second pair of spacer rings mounted at each end of insulating cylinder of the second of the sizing rolls, wherein each of the spacer rings has an outer cylindrical bearing surface that extends beyond the outer glass sizing surface of the insulating cylinder and wherein each of the spacer rings is configured to have a cylindrical outer surface within a tolerance of no more than +/- 0.0125 mm; and the apparatus further comprises a translational drive device capable to move the sizing rolls toward one another such that the spacer rings on the first sizing roll come into contact against the spacer rings on the second sizing roll to define the glass sizing gap between the first sizing roll and the second sizing roll. a glass feed device for supplying a supplied stream of molten glass or glass-ceramic; a pair of forming rolls (14, 16) maintained at a surface temperature of 500° C or higher, the forming rolls being spaced closely adjacent each other defining a glass forming gap between the forming rolls with the glass forming gap located vertically below the glass feed device for receiving the supplied stream of molten glass and thinning the supplied stream of molten glass between the forming rolls to form a formed glass ribbon having a formed thickness; a pair of sizing rolls (24, 26) maintained at a surface temperature of 400° C or lower, at least one of the sizing rolls having a textured surface, the sizing rolls being spaced closely adjacent each other defining a glass sizing gap between the sizing rolls with the glass sizing gap located vertically below the forming rolls for receiving the formed glass ribbon and thinning and imparting texture to the formed glass ribbon to produce a sized glass ribbon having a desired thickness, a desired thickness uniformity, and a desired texture on at least one surface of the glass ribbon; wherein each of the sizing rolls comprises an insulating cylinder having an outer glass sizing surface, characterized in that the sizing rolls further comprise a first pair of spacer rings mounted at each end of insulating cylinder of the first of the sizing rolls, and a second pair of spacer rings mounted at each end of insulating cylinder of the second of the sizing rolls, wherein each of the spacer rings has an outer cylindrical bearing surface that extends beyond the outer glass sizing surface of the insulating cylinder and wherein each of the spacer rings is configured to have a cylindrical outer surface within a tolerance of no more than +/- 0.0125 mm; and the apparatus further comprises a translational drive device capable to move the sizing rolls toward one another such that the spacer rings on the first sizing roll come into contact against the spacer rings on the second sizing roll to define the glass sizing gap between the first sizing roll and the second sizing roll.