How tall are you?

How tall are you?

I'm 5.56 5'6" or feet, 166.6 cm tall. Maybe I'm one of the tall woman women in Japan.
In japan Japan, we use unit of the the unit of centimeters. 1 feet foot is about 30.48cm.
And We also use the kilometers. 1 mile is about 1.6 kilometers.
Sometimes it's confuses me, for example: I'm at a loss for which size to choose to choose size among when it comes to buying shoes from overseas. overseas shoes,

How tall are you?

I'm 5.56 feet or 166.6 cm tall. I'm probably one of the taller women in Japan.
In Japan,we use centimeters to measure height.1 foot is about 30.48cm.
And we use the kilometer for distance.1mile is about 1.6 kilometers.
Sometimes I get confused when I see English units! For example, I don't know which size to get when I buy shoes from overseas!

("I'm at a loss" is usually used with confusing moral situations)

2nd step result

How tall are you?

I'm 5 feet 6 inches or 1m67 tall. [I'm tall for a japanese woman]

In japan, we use centimeters. 1 foot is 30.48 cm.

We also use kilometers. 1 mile is 1.6 kilometers.

Sometimes it confuses me, for exemple I'm at a loss [which size to choose for imported shoes].

3rd step: what could be changed / what english speaker would say

I would add one word "I'm pretty tall for a japanese woman"

And I would say "it confuses me..." like Tim

But I'm not a native speaker!

You should listen to them and not to me ^^

Result of the 3rd step: See other corrections!

My final advice:

Don't forget the spaces before and after words, and keep on writing!

I'm confused. There are many corrections. In your place I would not know what is wrong and what is not. I would not know what must be changed (step 1), what should be changed (step 2), and what could be changed (step 3).

Step 1: what has to be changed

How tall are you?

I'm 5.56 feet, or 166.6 cm tall.Maybe I'm one of a tall woman in Japan. 

In japan,we use unit of the centimeters.1 foot is about 30.48cm. 

And we use the kilometers.1mile is about 1.6 kilometers. 

Sometimes it's confuses me, for example I'm at a loss which size to choose size among overseas shoes,when I buy it them.

1st step conclusion: There are very few mistakes in your entry ^_^

1st step result:

How tall are you?

I'm 5.56 feet or 166.6 cm tall. Maybe I'm a tall woman in Japan.

In Japan, we use centimeters. 1 foot is about 30.48 cm.

And we use kilometers. 1 mile is 1.6 kilometers.

Sometimes it confuses me, for exemple I'm at a loss which size to choose among overseas shoes, when I buy them.

Step 2: what should be changed

fine > better

1) 5.56 feet > 5 feet 6 / 5 feet 6 inches

2) 166.6 cm > 1m67

3) Maybe I'm a tall woman in Japan the meaning is not clear, you could say

> I'm a tall japanese woman

> I think I'm tall for a japanese woman / for a woman in Japan

> Maybe I'm one of the tallest women in Japan

4) 1 foot is about 30.48 cm > 1 foot is 30.48 cm or 1 foot is about 30 cm

5) And we use > We use / We also use

6) which size to choose among overseas shoes the meaning is not clear, you could say

> which size to choose for imported shoes (if you buy them in Japan)

> which size to choose when I buy them overseas (if you buy them abroad)

Conclusion: 2 sentences should be modified because they are not so clear

How tall are you?

I'm 5.56 feet, or 166.6 cm tall. Maybe I'm one of tall I'm considered tall for a woman in Japan. In Japan, we use unit of the centimeters (1). 1 foot (2) is about 30.48cm.
And We also use the kilometers. 1 mile is about 1.6 kilometers. Sometimes it confuses me when I buy shoes overseas. I never know which size to choose.(3)

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1. I shortened that sentence a little. What you probably meant to say was, "In Japan, we use the unit of centimeters." But I shortened it a little to make it simpler.

2. When it's just 1 foot, you use the singular form "foot". You only use the plural form, "feet" if it's anything over 1.

3. That last sentence was getting confusing when I was trying to correct it. So instead, I just rewrote the sentence how I think you meant it.