Used Skylight 28 1/2" x 28 1/2" (with inner skylight)Used Skylight 28 1 2" x 28 1 2" (with inner skylight) OUTER FRAME DIMENSIONS: 28 1 2" x 28 1 2" INNER CUTOUT HOLE DIMENSIONS: 22 1 2" x 22 1 2" NOTES: Outer and inner skylight both in good shape. See images. USED PART DISCLAIMER: ** Please Read Full Product Description Before Purchasing** All used parts are from dismantled RV trailers or Motorhomes. If inventory is greater than 1 , It is possible the part is not the exact one displayed in the picture.