Choosing the right shoe and sandal size is an important factor in providing comfort when moving and avoiding foot problems such as pain or blisters. One of the common questions many people ask is "What size shoe should I wear if I wear size 39 sandals?" . In fact, the size of sandals and shoes has certain differences due to the structure and style of each type. In this article, Shondo Blog will share with you how to choose shoe size based on sandal size, specifically size 39, and the factors that affect choosing the correct shoe size.
1. If I wear size 39 sandals, what size shoes should I wear?
To answer this question, we first need to understand that sandals and shoes are not exactly the same size. Sandals are usually designed to be more roomy and comfortable, as they are mainly used in comfortable situations such as at home, at the beach or walking around town. Meanwhile, shoes are usually designed to hug the foot more closely to ensure support and stability for the foot during more moving activities such as walking, running or working.
So if you wear size 39 sandals, what size shoes should you wear? As a general rule, size 39 sandals are usually equivalent to size 39 shoes in the European (EU) sizing system. However, this can vary depending on the brand and style of the shoe. Typically, to ensure a good fit, users may need to choose a slightly larger shoe, such as a size 40, especially for shoes with a slim-fit design such as sneakers, leather shoes or running shoes.
However, choosing shoes also depends on the style and brand. Some types of sneakers have a tighter fit, so you may need to increase 0.5 to 1 size to ensure comfort for your feet, especially when wearing socks or using for a long time.
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2. The difference between shoe and sandal sizes by country
Each country has a different shoe sizing system. So when shopping or choosing a size, it is important to understand the differences between these systems to choose the best fit. Here are the basic differences between shoe and sandal size charts of some countries:
European size system (EU)
- This is a popular system in Vietnam and many other countries. In this system, shoe and sandal sizes are usually calculated based on foot length in centimeters.
- Size 39 EU is equivalent to a foot length of about 24.5 cm.
UK size system
- The UK sizing system is very different to the European one. UK shoe/sandal sizes are usually 1-2 sizes smaller than European sizes.
- For example: Size 39 EU is equivalent to size 6 in the UK system.

US size system
- In the US, shoe sizes are calculated significantly differently from the EU and UK systems. US shoe sizes are typically 1-1.5 sizes larger than the European system.
- For example: If you wear size 39 EU sandals, you can choose size 7 in the US system.
Japanese size system
- The Japanese sizing system measures foot length directly in centimeters, so choosing the size here is relatively easy.
- Size 39 EU is usually equivalent to about 24.5 cm in the Japanese system.
In short, EU size 39 is equivalent to UK size 6 and US size 7. The size systems of different countries have certain differences. Therefore, when choosing shoes based on sandal size, you need to pay attention to the standards of the place where you buy the product.
>>>See more: Are shoe sizes and sandal sizes the same?3. Some notes when choosing shoe size based on sandal size
Choosing shoe size based on sandal size is not simply a direct conversion, but also depends on many other factors such as style, material and purpose of the shoe. Below are some important notes to help you choose the right shoe based on sandal size:
- Choose shoes 1 size larger if wearing socks
If you regularly wear socks with your shoes, consider choosing shoes that are 0.5 to 1 size larger than your sandal size. This will give your feet room and prevent them from feeling tight.
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- Consider shoe type, shoe style
Shoes that hug your feet like sneakers or leather shoes usually require you to choose a size larger than your slipper size. On the contrary, sandals or loafers can be the same size as your slipper size.
- Choose shoes based on foot shape
If you have wide feet, consider choosing shoes with a wider toe box to avoid feeling cramped. For those with long, slender feet, choosing the right size is easier.
4. Conclusion
In short, that is the answer to the question of what size shoe should I wear if I wear size 39 sandals ? With the above notes and instructions, hopefully you will find the most suitable pair of shoes based on your sandal size.
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