The factory accepts as either Inside or Outside Mount only. The proper installation brackets and valance returns will be provided depending on the product ordered and the type of mount. Inside measurements represent the exact window opening size from which deductions must be taken to fit the blind inside.
Outside measurements represent the exact blind size needed.
Use a steel tape measurements. Never use a cloth tape as it may stretch. J.C. Blinds are custom made to your measurements and are not returnable. The factory can not accept changes or cancellation after materials are cut. Inside Mount 1.