Surround Measurement Instructions The Finish Window Surround Width Measurement is the inside of the extension jam to the inside of the opposing extension jam. Plant and Cat shelves mount directly to these surfaces. Watch the video Cat or Plant Shelf Quote Name * Name First First Last Last Email * Phone Number of Cat or Plant Shelves Desired * 123456789101112131415161718192020+ Surround Measurement - Width (in) * Measure from the inside of the left window trim, to the inside of the right window trim. View the video for measurement instructions: https://www.youtube.com/watch?v=Y3iAZQUPQ38 Finish Option on Sill * Primed Natural Additional Comments / Notes If you are human, leave this field blank. Submit Δ