Please look at pictures above for measuring explanations. Stock Masonry Door (Overlap Fit/Outside Mount) Lead time 2-3 weels for stock 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 The Decor is an anodized aluminum enclosure with 2 3/4" top and side panels, and a 11/16" bottom panel. • Fast and Easy To Install Using Just 4 Screws • Full Frame Construction Assures Precise Door Alignment • Doors Open and Close Effortlessly • Bifold Track or Full Swing Doors "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