The 172OP is the sole square-shaped, opal glass shade in our collection. As a general rule of thumb, consider using similar glass types - all opal glass, all etched/frosted glass, or glass of the same colors - throughout a single room. Keep things interesting by varying the shade shapes. For example, if you were lighting a small bathroom you could place the 172OP on the Umpqua, and pair it with the Jefferson and 001OP-12 schoolhouse shade. See more shades with a 2 1/4" fitter. Specifications Item # 172OP Fitter 2.25" Width 3.5" Height 4.5" Finish Shiny opal Price As Shown Base Total $22.00 Grand Total $22.00