Size iyi günler dilerim.

Size means to you.

It is the dative form of siz, which is the Turkish pronoun for:

• you (plural)
• or you (singular, polite/formal)

So in this sentence, size shows the person receiving the wish: to you.

Because Turkish changes pronouns depending on their role in the sentence.

• siz = you
• size = to you

The ending -e / -a is the usual dative case ending in Turkish, often meaning to or for.

So:

• siz = you
• size = to you

In Size iyi günler dilerim, the speaker is literally wishing good days to you.

İyi günler is a fixed and very common Turkish expression.

Literally it is good days, not good day. Turkish often uses the plural in greetings and polite formulas like this.

A few common examples:

• İyi günler = good day / have a good day
• İyi akşamlar = good evening
• İyi geceler = good night

So even though English usually uses the singular in some of these expressions, Turkish often prefers the plural form.

Dilerim comes from the verb dilemek, which means:

• to wish
• to express a wish
• sometimes to hope for in polite expressions

Dilerim means I wish.

So the sentence is literally:

• Size = to you
• iyi günler = good days
• dilerim = I wish

Literal structure: I wish good days to you.

Because in Turkish, the verb ending often already shows the subject.

Here, dilerim ends in -im, which tells you the subject is I.

So Turkish does not need ben here.

• (Ben) size iyi günler dilerim.
• Size iyi günler dilerim.

Both are grammatical, but Turkish often leaves out pronouns when they are already clear.

Using ben would add emphasis, but in normal speech it is usually omitted.

Yes, it sounds polite and somewhat formal.

Size iyi günler dilerim is more formal than simply saying:

• İyi günler

It may sound appropriate in:

• customer service
• professional emails
• formal conversation
• respectful speaking to someone older or not well known

In everyday speech, many people would simply say İyi günler instead of the full Size iyi günler dilerim.

Yes. Sana iyi günler dilerim means the same thing, but with informal singular you.

Compare:

• sana = to you (informal singular, from sen)
• size = to you (plural or polite/formal, from siz)

So:

• Sana iyi günler dilerim = I wish you a good day / good days (informal)
• Size iyi günler dilerim = I wish you a good day / good days (polite/formal or plural)

Choose sana for friends, family, children, etc. Choose size for respectful or plural situations.

People can say it, but it is more formal and less common than just İyi günler.

In daily life, Turkish speakers very often use short greeting formulas:

• İyi günler
• İyi akşamlar
• Görüşürüz

Size iyi günler dilerim sounds more deliberate and polished, like:

• a formal farewell
• a customer-service phrase
• a written message
• a respectful closing line

So it is natural, but not the most casual choice.

The order here is:

• Size = to you
• iyi günler = good days
• dilerim = I wish

Turkish often puts the verb at the end, so this is a very normal structure.

This word order is natural and clear. Turkish does allow some flexibility, but changing the order can shift emphasis.

For example:

• Size iyi günler dilerim. = neutral, standard
• İyi günler dilerim size. = possible, but more marked or poetic/emphatic

For a learner, Size iyi günler dilerim is the best model.

Yes.

İyi günler dilerim means I wish you good days or more naturally I wish you a good day.

The person receiving the wish is understood from context, so size can be omitted.

Compare:

• İyi günler dilerim. = I wish you a good day.
• Size iyi günler dilerim. = I wish you a good day.

Including size makes the recipient more explicit and can sound a bit more formal or emphatic.

The difference is mostly one of style and formality.

• İyi günler = standard greeting/farewell; very common
• Size iyi günler dilerim = fuller sentence, more formal, literally I wish you good days

So:

• If you are leaving a shop, office, or conversation, İyi günler is often enough.
• If you want to sound more polished, respectful, or formal, Size iyi günler dilerim works well.

You would most naturally use it:

• at the end of a formal conversation
• in a polite email or message
• when speaking respectfully to a customer, guest, or elder
• as a courteous closing

It functions more like a farewell wish than a simple greeting.

So it is especially suitable when you are ending an interaction and wishing the other person well.

A simple pronunciation guide is:

SEE-zeh ee-YEE gewn-LER dee-leh-REEM

A few details:

• s is always like English s, never z as in rose
• i is like ee
• gü has the Turkish ü, similar to German ü or French u
• r is lightly rolled or tapped
• stress is fairly even, but the final syllables of Turkish words are often prominent

Word by word:

• Size → SEE-zeh
• iyi → ee-YEE
• günler → gewn-LER
• dilerim → dee-leh-REEM

Yes, it can.

İyi günler is often used both:

• when greeting someone during the daytime
• and when leaving, meaning something like have a nice day

In Size iyi günler dilerim, the meaning is clearly the farewell/wish sense, because of dilerim = I wish.

So the full sentence is not just a greeting; it is explicitly a polite wish.

Yes, very much so. Turkish uses the same pattern with other expressions.

For example:

• Size iyi akşamlar dilerim. = I wish you a good evening.
• Size iyi geceler dilerim. = I wish you a good night.
• Size mutlu bir gün dilerim. = I wish you a happy day.

This pattern is useful because once you know dilemek and the dative form like size, you can build many polite wishes.