Cellular Shade Specialties Perfect Arches (Do not require a template)The Perfect Arches are those where the radius of the circle is consistent at all points.Non-perfect Arches (Require Templates)The Non-perfect Arches are not consistent at all points. Deviation of even 1/16″ makes it imperfect. ARCHES Width MINIMUM = 18″ MAXIMUM = 84″Height MINIMUM = 9″ MAXIMUM = 48″Non-movable archesNon-perfect arches require templates QUARTER ARCHES Width MINIMUM = 9″ MAXIMUM = 50″Non-movable quarter archesNon-perfect quarter arches require templates CIRCLES Width MIN 9/16″ = 9″ MAX 9/16″ = 42″Width MIN 7/16″ = 12″ MAX 7/16″ = 42″Non-movable circlesNon-perfect circles require templates OCTAGONS Width MINIMUM = 12″ MAXIMUM = 48″Height MINIMUM = 12″ MAXIMUM = 48″Measurement of all 8 sides are needed.Templates are required TRAPEZOIDS Width MINIMUM = 12″ MAXIMUM = 60″Height MINIMUM = 12″ MAXIMUM = 72″The longer side drop can not exceed 130% of the shorter side drop.Measurement of all 4 sides are needed Phone: (386) 301-5172 | Email: info@itainc.net | 9 W. TOWER CIR, ORMOND BEACH, FL 32174 2023 © Copyright ITA Window Fashions | Designed and Managed by 7Fins – Portfolio Rights By Copyright.