Sul manichino in vetrina c’è la stessa giacca che ho visto nella nuova collezione.

Sul is a contraction of su + il, meaning on the.

• su = on
• il = the
• sul = on the

So Sul manichino means On the mannequin.

This kind of contraction is very common in Italian:

• su + il = sul
• su + lo = sullo
• su + la = sulla
• su + i = sui
• su + gli = sugli
• su + le = sulle

Here, manichino means mannequin, the display figure used in a shop.

Be careful: in some contexts, manichino can also mean a dummy or model figure, but in this sentence it clearly refers to a shop mannequin because of in vetrina.

In vetrina means in the shop window or on display in the window.

• vetrina = display window / shop window
• in vetrina is a common expression for something being displayed publicly in a store window

So Sul manichino in vetrina gives the setting: the mannequin is in the display window.

C’è means there is. It is different from plain è (is).

• c’è = there is
• è = is

In this sentence, c’è introduces the existence/presence of something:

Sul manichino in vetrina c’è la stessa giacca...
= On the mannequin in the window, there is the same jacket...

Italian often uses c’è / ci sono where English uses there is / there are.

Examples:

• C’è una giacca qui. = There is a jacket here.
• Ci sono due giacche qui. = There are two jackets here.

Because c’è is a shortened form of ci è.

• ci
  • è → c’è

This contraction is standard and always written with the apostrophe.

La stessa giacca means the same jacket.

• la = the
• stessa = same
• giacca = jacket

In Italian, stesso/stessa/stessi/stesse agrees with the noun in gender and number.

Since giacca is feminine singular, you use stessa:

• lo stesso cappotto = the same coat
• la stessa giacca = the same jacket
• gli stessi pantaloni = the same trousers
• le stesse scarpe = the same shoes

Here che is a relative pronoun, meaning that or which.

So:

la stessa giacca che ho visto
= the same jacket that I saw

It links giacca to the clause ho visto.

In Italian, che is very common for that/which/who when it is the object of the verb:

• Il libro che leggo = the book that I’m reading
• La ragazza che conosco = the girl that I know

Ho visto is the passato prossimo, a very common past tense in Italian. It means I saw or I have seen, depending on context.

It is formed with:

• ho = I have
• visto = seen

So che ho visto literally means that I have seen, but in English it is often simply that I saw.

Why not the others?

• vedevo = I was seeing / I used to see → imperfect, used for ongoing or habitual past actions
• vidi = I saw → remote past, literary or regional in many parts of Italy

For everyday spoken Italian, ho visto is the normal choice here.

Because in this sentence the past participle is used with avere:

ho visto

With avere, the past participle usually stays in the default masculine singular form, even if the object is feminine:

• Ho visto la giacca
• Ho comprato le scarpe
• Abbiamo trovato la borsa

So visto does not change here.

A learner may later notice agreement in some cases with direct object pronouns:

• L’ho vista = I saw it/her

But in your sentence, che does not force visible agreement in standard everyday usage, so ho visto is perfectly normal.

Nella nuova collezione means in the new collection.

Nella is a contraction of in + la:

• in = in
• la = the
• nella = in the

So:

• nella nuova collezione = in the new collection

Like sul, this is another common preposition + article contraction.

Some common ones with in:

• nel = in the
• nello = in the
• nella = in the
• nei = in the
• negli = in the
• nelle = in the

Italian often allows more flexibility in word order than English.

A more neutral English-style structure would be something like:

La stessa giacca che ho visto nella nuova collezione è sul manichino in vetrina.

But the actual sentence starts with the location:

Sul manichino in vetrina c’è...

This puts emphasis on the visual scene first: On the mannequin in the window, there is...

Italian often does this to highlight:

• location
• time
• context
• what the speaker notices first

So the word order is natural and idiomatic.

Yes, that would also be grammatical:

C’è la stessa giacca sul manichino in vetrina che ho visto nella nuova collezione.

However, the original version is clearer and more elegant because it separates the location early:

Sul manichino in vetrina c’è la stessa giacca che ho visto nella nuova collezione.

Also, placing che ho visto nella nuova collezione right after la stessa giacca makes it immediately clear that the relative clause refers to giacca.

It describes the jacket.

The structure is:

• la stessa giacca = the same jacket
• che ho visto nella nuova collezione = that I saw in the new collection

So the relative clause attaches to giacca, not to manichino.

The meaning is: There is the same jacket on the mannequin in the window that I saw in the new collection.

They refer to two different shopping-related ideas:

• vetrina = the physical display window of the shop
• collezione = the collection or line of clothing being presented by the brand/store

So:

• the jacket is physically on the mannequin in the shop window
• it is the same jacket the speaker previously saw in the new collection

A natural pronunciation would sound roughly like this:

sul mani-KI-no in ve-TRI-na c’è la STES-sa GIAC-ca ke o VI-sto NEL-la NWO-va kol-let-TSYO-ne

A few useful notes:

• ch in che sounds like k
• gi in giacca sounds like the j in jam
• gli does not appear here, so pronunciation is fairly straightforward
• c’è is stressed on è
• stessa has a strong double ss
• giacca has a strong double cc

If you want to sound more natural, pay attention to the double consonants in:

• stessa
• giacca

Not very naturally. A word-for-word version would be something like:

On-the mannequin in window there-is the same jacket that I-have seen in-the new collection.

That helps show the structure, but natural English would be:

The mannequin in the shop window is wearing the same jacket I saw in the new collection.

or

There’s the same jacket on the mannequin in the window that I saw in the new collection.

So the Italian structure is slightly different from the most natural English phrasing.