Iron Door Sizes: Standard Dimensions & How to Measure
Standard single iron door sizes
The most common single-door widths are 36″, 38″, 40″, and 42″, with heights of 81″, 96″, and 97″ (roughly the classic 6′8″ door and the increasingly popular 8′ door). A 36″ × 80″ opening is the traditional US standard; iron doors trend a step larger because the material carries taller, more dramatic openings comfortably.
Standard double iron door sizes
Double (French-style) iron entries commonly run 61″ to 74″ wide overall — two leafs of roughly 30″–37″ each — at the same 81″–97″ heights. If you're weighing one large single against a pair, read double vs. single iron entry doors.
Bigger than standard: transoms, sidelights, and pivot doors
Iron's strength lets entries grow well past standard: add a transom above for height, sidelights for width, or step up to a [pivot door](/doors/product-type/pivot-doors), which rotates on a floor pivot instead of hinges and handles oversized leafs gracefully. Grand two-story entries combine a double door with a full arch-top transom.
How Abby sizes a custom door
Every Abby custom door is built to your exact opening — you don't force your architecture into a catalog size. Tell us the rough-opening measurements (or send your builder's spec) and the door is fabricated to fit, in 12-gauge steel, typically in ~6–8 weeks. Prefer no wait? In-stock doors are ready to ship, and each product lists its exact dimensions — e.g., a "72 × 96" is a 72-inch-wide, 96-inch-tall double unit.
Arched, round-top, and custom shapes
Arch-top and round-top openings are normal territory for forged steel — the frame is built to the curve rather than squared off with filler. Photograph the opening and share the widest/tallest points; the fabrication drawings handle the rest.
Frequently asked questions
What is the standard size of an iron entry door?
Singles most commonly run 36–42 inches wide by 81–97 inches tall; doubles about 61–74 inches wide overall at the same heights. Iron doors are usually made to order, so these are common builds rather than hard limits.
Can iron doors be custom sized?
Yes — custom sizing is the norm, not the exception. Abby fabricates each custom door to your exact rough opening, including arch-tops and oversized entries, typically in about 6–8 weeks.
What size are double iron doors?
Commonly 61–74 inches wide overall (two 30–37 inch leafs) by 81–97 inches tall, before adding sidelights or a transom. See double vs. single.
Do I measure the door or the opening?
Measure the rough opening — the framed hole in the wall — not the old slab. Width in three places, height on both sides, use the smallest numbers, and note jamb depth.
Do bigger iron doors cost more?
Yes; size and configuration are the biggest price drivers. A double with sidelights and a transom sits at the top of the range — see what iron doors cost.