Xiaomi Mi 9: how many centimeters and millimeters – the full dimensions of the smartphone

The Xiaomi Mi 9, launched in 2019, is still a popular choice among users who value the balance of performance and design. One of the key parameters when buying or selecting accessories is its physical dimensions. But how exactly is this flagship measured? How many centimeters does the Xiaomi Mi 9 body take up in length, width and thickness? And why is this data important not only for aesthetics but also for practical use?

In this article, we will take a closer look at the model’s official dimensions, translate them into convenient units of measurement (centimeters and millimeters), and explain how to interpret these numbers correctly. You will learn how size affects ergonomics, case selection, and even compatibility with wireless charging. In addition, we will compare the Mi 9 with other popular Xiaomi smartphones and give tips for selecting accessories based on accurate measurements.

Official dimensions Xiaomi Mi 9: data from the manufacturer

According to the technical specification provided by Xiaomi, the Mi 9 has the following dimensions:

• 📏 Length (height): 157.5 mm
• 📐 Width: 74.67 mm
• 📊 Thickness: 7.61 mm
• ⚖️ Weight: 173 grams

These parameters are measured without the protruding main camera, which adds a few millimeters to the thickness at the top of the body. It's important to note that the manufacturer specifies the dimensions in millimeters, the most accurate unit for electronics, but for ease of perception, many users prefer to translate them into centimeters.

To translate, it is enough to divide each value by 10:

• 📏 Length: 15.75 cm
• 📐 Width: 7.467 cm
• 📊 Thickness: 0.761 cm

This size makes the Mi 9 a compact flagship of its time, especially against the backdrop of modern devices with a screen diagonal of 6.39 inches. However, not all accessories take into account the camera protrusion - we will talk about this later.

Why is it important to know the exact size of the Xiaomi Mi 9?

At first glance, the dimensions of a smartphone may seem like a secondary characteristic, but they directly affect several key aspects:

1. Ergonomics: The size of the device depends on how comfortable the device is in the hand. For example, the width of the Mi 9 at 7.467 cm allows most users to reach the edges of the screen with their thumb without interception.
2. Compatible with covers: even a difference of 1-2 mm can make the case too tight or, conversely, dangling, especially critical for models with a protruding camera.
3. Wireless charging: Some charging stations have limitations on the thickness of the smartphone. For example, if you use a 2 mm thick case, the total height of the Mi 9 will be 9.61 mm - this can interfere with charging.
4. Pockets and bags: The 15.75 cm length makes the smartphone compact enough to wear in jeans, but some thick-protected cases can make it harder.

Also, dimensions are important when choosing car holders or tripods.Many versatile mounts are designed to be up to 8cm wide, so the Mi 9 fits perfectly, but with a case it may not fit.

⚠️ Warning: If you plan to use the Xiaomi Mi 9 with wireless charging, keep in mind that the thickness of the case should not exceed 3-4 mm. Otherwise, the induction coil may not work due to the increased gap.

How to measure Xiaomi Mi 9 at home?

If you already have a smartphone and want to specify its dimensions yourself, use the following instructions:

Steps for accurate measurement:

1. Put the smartphone on a flat surface with the screen up.
2. Measure the length (from the bottom edge to the top, without considering the camera).
3. Measure the width (from left edge to right, including side buttons).
4. For thickness, use a bar or attach a ruler to the end, then measure the gap between the surface and the bottom face of the smartphone.

Note that if you measure a smartphone in a case, add its thickness to the final values. For example, a thin silicone case adds ~1 mm, and an armored one - up to 3-4 mm.

To check the accuracy, compare your measurements with official data:

⚠️ Warning: If your measurements differ from the official measurements by more than 1 mm, check if the case of the smartphone is deformed.This can occur after falls or improper assembly after repair.

Comparison of Xiaomi Mi 9 with other Xiaomi models

To better understand how compact the Mi 9 is, let’s compare it to other popular smartphones of the brand:

The table shows that the Mi 9 is in the middle: it is smaller than the Mi 10 and Redmi Note 9 Pro, but larger than the Xiaomi 12. While the thickness of 7.61 mm makes it one of the thinnest flagships in the lineup. Interestingly, the Mi 9T, despite the same screen diagonal, is 1.2 mm thicker - this is due to the retractable front camera.

If you care about one-handed ergonomics, pay attention to the width: the Mi 9 is 74.67 mm, which is considered optimal for most users. For comparison, the iPhone 13 is 71.5 mm wide, and the Samsung Galaxy S21 is 71.2 mm wide. Thus, the Mi 9 is slightly wider, but due to the thinner body, the ease of retention does not suffer.

💡

When choosing between the Mi 9 and Mi 9T, consider that the second one is thicker because of the camera mechanism, but it does not have a monobrow on the screen. If you are critical of thickness, you should stop with the classic model.

Selection of cases and accessories by size Xiaomi Mi 9

Knowing the exact dimensions of the smartphone, you can confidently choose accessories. Here are the key points to pay attention to:

• 🛡️ Cases: Look for models marked "For Xiaomi Mi 9" or "6.39 inches." Make sure the description is accurate: 157-158 mm long, 74-75 mm wide.
• 🔋 Wireless charging: Choose stations with Qi-standard support and check the maximum thickness of your smartphone (usually up to 10mm with a case).
• 🚗 Car holders: Most magnetic or clamping mounts support widths up to 80 mm, but specify the range of adjustment.
• 📸 Tripods and gimbals: for the Mi 9, universal holders with a clamping width of 50–90 mm will suit.

Pay special attention to cases with a notch under the camera. The Mi 9 camera module protrudes about 1.5 mm, so thin covers (up to 1 mm) may not protect the lenses from scratches. The best option is cases with thickened sides around the camera (for example, Spigen Tough Armor or Ringke Fusion-X).

When buying accessories in Chinese stores (such as AliExpress), always check the reviews with photos: often sellers indicate universal dimensions that do not take into account the features of a particular model. For example, a case for the Mi 9 may be suitable for the Mi 9 SE, but due to the different height of the camera will have problems with installation.

Frequent mistakes when choosing accessories for Xiaomi Mi 9

Even with the exact sizes, users often face problems when buying accessories, and here are the most common mistakes and how to avoid them:

1. Ignoring camera projection: Many cases do not take into account that the Mi 9 camera module protrudes 1.5-2 mm. as a result, the smartphone staggers on the table or scratches the lens. Solution: choose cases marked with camera protection or raised edges.
2. The Mi 9 has a power button on the right and the volume buttons on the left. Some universal cases have symmetrical cutouts, which makes access difficult. Solution: buy cases specifically for the Mi 9.
3. Wireless charging problems: If the case is too thick or metalized, charging may not work.Solution: Use cases no more than 3 mm thick and no metal inserts.
4. Incorrect screen size: some of the security windows are sold as 6.39" but don't take into account the shape of the cutout for the front camera. Solution: look for windows marked "For Xiaomi Mi 9" or "notch-less."

Another common problem is buying accessories for the Mi 9T instead of the Mi 9. Despite the similar names, these models have different dimensions and camera locations. Always check the exact model before buying!

⚠️ Warning: If you use a magnetic holder for a car, make sure that the case is free of metal plates (e.g. for wireless charging).This can cause the battery to overheat or malfunction NFC.

How does the size of Xiaomi Mi 9 affect ergonomics?

Ergonomics is not just about ease of retention, but also about how a smartphone interacts with the user in everyday scenarios, and how the dimensions of the Mi 9 affect the experience of use:

• 🤏 One-handed: With a width of 74.67 mm and rounded edges, the Mi 9 is comfortable to hold and control with one hand. However, for a 6.39 screen, reaching the top corner can be difficult, and the One-handed mode feature in the settings MIUI will help.
• 🎮 Gaming experience: a slim body (7.61 mm) and a weight of 173 g make the smartphone comfortable for long gaming sessions. For comparison, the ASUS ROG Phone weighs 230 g — the difference is palpable.
• 👖 Pocket-wielding: 15.75 cm long allows you to fit your smartphone in most denim pockets, but it can be tight with a case. The best option is cases up to 2 mm thick.
• 📱 Multimedia: The 19.5:9 aspect ratio and compact bezels make video viewing comfortable, but for some users, the 6.39" diagonal may seem small compared to today's 6.7-6.8-inch flagships.

Fun fact: despite being compact, the Mi 9 has stereo speakers that are located in the upper and lower parts of the body, which improves sound when watching video in landscape orientation, but requires careful choice of cases - they should not overlap the grilles of the speakers.

If you use your smartphone horizontally often (for example, for games or videos), pay attention to the location of the buttons: they do not interfere with retention, but some cases with a ribbed texture can rub your fingers with prolonged use.

💡

Xiaomi Mi 9 is one of the most balanced flagships in ergonomics: its width allows you to comfortably hold the device with one hand, and the weight of 173 g does not tire with prolonged use.

FAQ: Frequent questions about the size of Xiaomi Mi 9