Please look at pictures above for measuring explanations. Stock Masonry Door (Overlap Fit/Outside Mount) Lead time is 2-4 weeks on stock fireplace doors and 4-6 weeks for custom fireplace doors. Custom doors are non-refundable once construction has begun. Thermo-Rite doors are made in the U.S.A. Benefits: Life guarantee on glass Tarnish free frames mean no polishing! Many styles and finishes to choose from Mounting hardware and instructions included Thermo-Rites most popular brass plated enclosure features 2 coats of baked-on lacquer. This exclusive Regal feature is only one of many that gives it a lifetime of tarnish-free beauty. The Regal has 3" side panels, 1 1/4" top cap and 3" top and bottom filigree panels. This door also comes with a center draft control. "Wow! My product arrived after three days. Thanks for the fast shipping, I am glad I ordered here. My friend ordered  from a different site and it took six weeks for the item to arrive!!! Keep up the good work." Mary Clarke, CA