To measure an arch/radius for a quote/order just provide the width and height as shown or provide an actual template of the shape needed.

Moldings cut from measurements will be cad generated and cut to perfect size and shape.

Irregular shapes are not a problem and can be manufactured but an actual hard template must be provided. 

Please be advised that all templates will be followed exactly including any and all irregularities in the edges.

You can also provide a CAD drawing in DXF or AutoCad  ( R14 or less) formats.