Pouvez-vous me dire si vous avez ma pointure ?

Pouvez-vous is the inverted question form, which is a standard and polite way to ask a question in French.

• Vous pouvez = you can / you are able to
• Pouvez-vous ? = Can you ... ?

French often forms formal written or polite spoken questions by putting the verb before the subject pronoun and joining them with a hyphen:

• Vous pouvez → statement
• Pouvez-vous ? → question

So Pouvez-vous me dire... means Can you tell me...

A less formal alternative is:

• Est-ce que vous pouvez me dire... ?

Both are correct.

The hyphen is required in inversion questions in French, where the verb and subject pronoun switch places.

So:

• statement: Vous pouvez
• question: Pouvez-vous

This hyphen is just part of the grammar of formal question formation.

They belong to two different clauses.

1. Pouvez-vous me dire...

   • vous = the subject of pouvez
   • Can you tell me...

2. ...si vous avez ma pointure

   • vous = the subject of avez
   • ...whether you have my size

So the sentence literally works like:

• Can you tell me
• if you have my size?

The first vous belongs to can you tell me The second vous belongs to you have

Me dire means to tell me.

In French, object pronouns like me, te, lui, nous, vous, leur usually come before the verb they go with.

So:

• dire = to tell
• me dire = to tell me

That is why French says:

• Pouvez-vous me dire... not
• Pouvez-vous dire me...

This is very normal French word order.

Here si means if in the sense of whether.

So:

• si vous avez ma pointure = whether you have my size

This is different from another common use of si, where it can mean if in conditional sentences:

• Si j’ai le temps, je viendrai. = If I have time, I’ll come.

In your sentence, it is introducing an indirect yes/no question:

• Do you have my size? becomes
• Can you tell me if/whether you have my size?

Because pointure is a feminine noun in French.

So you use:

• ma pointure = my size

Compare:

• mon sac because sac is masculine
• ma pointure because pointure is feminine

This has nothing to do with who is speaking; it depends only on the grammatical gender of the noun.

In this sentence, pointure specifically means shoe size.

That is an important distinction:

• pointure = shoe size
• taille = size in general, often clothing size

So in a shoe shop, pointure is the natural word:

• Vous avez ma pointure ? = Do you have my shoe size?

In a clothing shop, you would more often hear:

• Vous avez ma taille ? = Do you have my size?

French uses avoir here because the idea is to have/carry/stock a size.

So:

• vous avez ma pointure ? literally = do you have my size?

In English, we also often say Do you have this in my size?, so the logic is actually quite similar.

It does not mean that the shop literally owns your personal size; it means Do you carry this item in my size?

Yes, it is polite and natural.

Reasons:

• vous is the polite or plural form of you
• Pouvez-vous... is a polite question structure
• me dire si... softens the request a little

It sounds appropriate in a shop.

A very direct version would be:

• Vous avez ma pointure ?

That is also common in speech, but slightly less formal.

Yes, absolutely. That is also correct and natural.

You have two common ways to ask this politely:

• Pouvez-vous me dire si vous avez ma pointure ?
• Est-ce que vous pouvez me dire si vous avez ma pointure ?

The first is a bit more formal or elegant because it uses inversion. The second is very common in everyday spoken French.

Yes, but depending on the situation, many speakers might use a shorter version.

Your sentence is correct and polite, but in real conversation people often simplify:

• Vous avez ma pointure ? = Do you have my size?
• Vous l’avez en 39 ? = Do you have it in size 39?
• Est-ce que vous avez cette paire en 39 ? = Do you have this pair in size 39?

So your sentence is good French, just a little more complete and careful than the shortest everyday version.

A rough pronunciation guide is:

poo-vay voo muh deer see voo zah-vay ma pwan-toor

A few useful points:

• Pouvez sounds roughly like poo-vay
• vous sounds like voo
• me is often a light muh
• dire sounds like deer
• si sounds like see
• avez sounds like ah-vay
• pointure sounds roughly like pwan-toor

There is also a liaison in:

• vous avez → voo zah-vay

That z sound appears because vous ends in a silent consonant and avez begins with a vowel.

Grammatically, yes:

• Peux-tu me dire si tu as ma pointure ?

But in a shop, vous is usually the safer and more polite choice, especially with someone you do not know.

Use tu only if:

• you know the person well, or
• the situation is clearly informal

For most customer-service situations, vous is best.

Because this is a normal statement inside an indirect question:

• si vous avez ma pointure = whether you have my size

So French uses the present indicative:

• vous avez

Ayez is a form of the verb avoir used in other contexts, such as the imperative or present subjunctive, and it would not fit here.

Yes, and that is often even more natural in a real shop.

For example:

• Pouvez-vous me dire si vous avez du 38 ?
• Vous avez du 38 ?
• Est-ce que vous avez cette paire en 38 ?

That is very common because shoe sizes are often asked for by number rather than by saying my size.