Choose Your Required Shape
Next Choose Your Required Shape.
Glass Tops
Two options are available on the Glass Tops page: Square/Rectangle or Round/Oval.
For Round the two size values X and Y need to be the same.
For ovals enter the smaller and larger of the two different diameters required as X and Y.
If you choose Arc a further measurement is required called the Shoulder Height which is the height you want the arc to start.
A box appears to enter this information.
and the image next to the figure changes to show you this.