As far as creating or improving a facility or space, the space is all about the details, and one of the details that you are going to come across happens to be doors. Another factor, usually disregarded, is that of regular door dimensions. Make this wrong, and you might find yourself with a serious installation problem, pathetic aesthetics or worse code violation.

Luckily, you do not need to go through this on your own. In any case, as an owner or contractor or an architect, Hotian is a solution you can rely on. Years of experience in manufacturing custom and standard doors enable Hotian to bring you not only a beautiful and finely crafted solution but also a high-precision product that is a global standard.

So, what is up with door sizes, and why should they be considered? And more so how to select the correct size that fits? Let us unpack that.

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🔍 Why Standard Door Sizes Are More Important Than You Think

Not only do measurements matter, but picking the right size of a door also means functionality, safety, accessibility, and aesthetics. Regardless of the setting, whether you are simply swapping out a single interior door or equipping the whole building, one thing is clear—size matters:

● Building Codes & Compliance: Normally in most countries laws are in place requiring a certain minimum width in regard to doors and accessibility (e.g., wheelchair-friendly doors).

● Installation In ease of installation: standard sizes make installation less complicated (and expensive) and make it possible to fit with pre-made frames and hardware.

● Aesthetic Balance: Doors should not be too big or too small so as to destabilize the balance of a room, making rooms feel congested or uncomfortable.

● Efficiency/Insulation: Correctly sized doors seal tighter and reduce the leakage of air and increase energy.

Knowledge of standard sizes of doors makes the process almost halfway to a painless project.

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📏 What Are the Most Common Standard Door Sizes?

Standard sizes vary slightly by region, but here's a breakdown of the most widely accepted dimensions around the world:

✅ Interior Doors:

● Height: Typically 80 inches (2032 mm)

● Width:

○ 24 inches (610 mm)—for closets or small bathrooms

○ 28-32 inches (711-813 mm) – for bedrooms and main interiors

○ 36 inches (914 mm)—for accessibility (ADA compliant)

✅ Exterior Doors:

● Height: 80 to 96 inches (2032 to 2438 mm)

● Width:

○ 36 inches (914 mm)—most common for main entryways

○ 42 inches (1067 mm)—luxury or custom builds

✅ Thickness:

● Interior doors: 1 3/8 inches (35 mm)

● Exterior doors: 1 3/4 inches (45 mm)

Want more detailed specs? Check out Hotian’s dedicated guide to standard door sizes to see regional standards, material considerations, and more.

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Hotian: Precision Craftsmanship That Meets Global Standards

Construction has no one-size-fits-all solutions—but sometimes, there is. Then that is what Hotian is worth. They do not sell doors but give advice and customize them to suit you perfectly, as they are supposed to.

This is why the world's clients trust Hotian:

1. International Regulatory and Consultation

Hotian produces doors that reflect the US, UK, EU and Asian codes in the manufacture process, so whereveryou construct; be it in New York or New Delhi, your order will conform to the local sense of building codes.

2. Not-just-standard customization

Want a 92-inch by 38-inch door? No problem. Hotian is all about customized solutions and enables architects and homeowners to have their way without having to lower the bar on performance.

3. High-Quality Materials

Hotian doors are made to last, of solid hardwood to engineered cores. They have a planet-friendly sourcing model, so you can rest assured knowing you are purchasing not only a lovely product but also a consciously made product.

4. Design Flexibility

You will be able to choose between the most popular standard door sizes and combine them with many finishes, glass inserts, and hardware types and even smart-lock compatibility.

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How to Choose the Right Size (With Hotian’s Help)

Choosing the right door size doesn’t need to be stressful. Here’s a simple process to follow, especially when working with Hotian:

1. Measure Your Opening—Get the rough opening dimensions (height, width, depth).

2. Determine the Door Type—Interior, exterior, sliding, French, etc.

3. Check Local Building Codes—Ensure your choice meets regional requirements.

4. Consult the Experts – Reach out to Hotian via their official website for recommendations based on your project needs.

5. Place a Custom or Standard Order – Choose from Hotian’s catalog or specify your own size and style.

6. Receive and Install with Confidence—Every door is prepped for easy installation, whether DIY or professional.

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🧠 Pro Tip: Bigger Isn’t Always Better

While oversized doors may look luxurious, they also require more wall space, hardware, and sometimes structural reinforcement. Stick to standard sizes when possible for ease and efficiency—but don’t hesitate to go custom if your design calls for it. Hotian has you covered either way.

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🌍 Final Thoughts: Open the Door to a Better Build

The ideal door is at the intersection of design, accuracy, and functionality, and it simply begins with the size. You may want to replace a bathroom door or outfit a posh home, but by being aware of your size (and selecting a companion like Hotian), you can save yourself some time, cash, and insurmountable pounds' worth of stress.

Well versed with designing the international standards, the reputation of quality and a commitment to customer success, Hotian as a brand is the designer and builder familiar with every designer, builder and homeowner across the globe.