TOP INNER TOP THICKNESS : 1" 2" 3" 4" 5" 6" DEPTH INNER DEPTH INNER BASE BASE NOTE about CENTER LINE: Depending on overall size of mattress, the center line (dotted line on diagram) may be cut for shipping purposes. If you need the foam to be left specifically as one piece or to be cut into two pieces, please contact us to make this request. NOTE about BEVEL: If you need to have your boat mattresses beveled, please contact us for a price quote. Enter in the dimensions above. Please enter the dimensions in INCHES. Dimensions will be rounded up to the nearest 1/4 inch. Do NOT subtract from overall size for Dacron / Fiberfill wrap. Click the "Continue" button for a price quote. Back to shapes