• Lamp Chimneys are used on oil lamps to control the flame, protecting it from drafts and dissipating the smoke. While many of these lamps have been electrified a chimney is still used as it enhances the overall balance and appearance of the lamp.
  
• Sconce Shades are seen on wall lamps, chandeliers, boudoir lamps and occasionally candlestick lamps. They often have a curved shade. Glass is clear or has etched design.
  
• Student Shades are a classic shape seen on many oil lamps. They are designed to direct the light downward and reduce glare for task lighting, hence the name "student shade". Available in standard 7" and 10" fitter sizes.
  
• Ball Shades are a round shape used to diffuse light. They are commonly used on antique parlor lamps, gone with the wind lamps and banquet lamps. Fitter size is typically 4".
  
• Reflector Shades, also known as I.E.S. Shades, are an upright bowl shape used to direct light upward. They are often used to support a fabric lamp shade.  This combination was very popular on Reflector Floor Lamps from the 1930's. 

Glass lampshade dimensions serve specific functional purposes in shade selection and installation.

The fitter measurement—represents the outer diameter of the shade where it fits in the lamp holder. This is a critical measurement to ensure a proper fit and secure mounting.

Depending on shade design, height and width measurements provide additional guidance for proportional compatibility and aesthetic balance, allowing you to select shades that align with both your lamp's mechanical requirements and your interior's visual composition.

Clear Glass provides a bright direct light. It can produce glare.

Frosted Glass provides a soft, diffused light 

White Glass produces a pleasing even light providing a wide spread illumination. 

Cased Glass directs the light downward making it ideal for task lighting.