• Overall Dimension of Plastic (includes flange) 17 1/4" x 17 1/4"
• Flange 1 1/4", Dome dimension 14 3/4" x 14 3/4"
• Thickness .118 Approximately 1/8"
• Height of Outer Dome 3 1/2"
• Height of Inner Dome 2 1/2" (All inner domes are acrylic)
• Dome tape only included with Double Dome orders
• Gradual Rise Profile (will not work with vertical rise or dome over frame units, contact us for helpful information regarding those shapes)
• We make all sizes! Please contact us if you need the size to be special.

This product is designed for use in an existing residential/commercial framed gradual rise skylight where the frame and retainer are screwed together to hold the plastic in place.  There is no such thing as a STANDARD size or deduction between the Outside of the retainer frame and the plastic underneath.  Please remove screws and measure tip to tip of plastic prior to ordering.