السوستة جنب الزرار.

A natural Egyptian pronunciation is:

es-soosta gamb ez-zorār

A few useful notes:

• السوستة → es-soosta
• جنب → gamb
• الزرار → ez-zorār

Short vowels are often not written in Arabic, so pronunciation has to be learned with the word.

In Arabic, especially in the present tense, sentences like this usually do not use a word for is/are.

So Arabic says:

• السوستة جنب الزرار

Literally, it is more like:

• the zipper next to the button

But the meaning is still The zipper is next to the button.

This is a very common Arabic structure.

Because this is Egyptian Arabic.

In Egyptian Arabic, the letter ج is usually pronounced like a hard g in go. So:

• جنب → gamb

In other varieties, especially in careful Modern Standard Arabic, you may hear something closer to janb.

Here جنب works like next to / beside.

So:

• جنب الزرار = next to the button

Historically, جنب is related to the idea of side, but as a learner, you can safely treat it as a location word used very much like a preposition in Egyptian Arabic.

ال is the Arabic definite article, meaning the.

So:

• السوستة = the zipper
• الزرار = the button

If the nouns were indefinite, you would usually remove ال:

• سوستة = a zipper
• زرار = a button

In Egyptian Arabic, you normally do not add the -n sound that learners may know from Standard Arabic indefiniteness.

Because both س and ز are sun letters.

With sun letters, the l in ال assimilates to the next consonant. So:

• السوستة is written with ال, but pronounced es-soosta
• الزرار is written with ال, but pronounced ez-zorār

This is a normal Arabic pronunciation rule.

The final ة is called taa marbuuTa.

In Egyptian Arabic, when a word ends there and you stop after it, it is usually pronounced like -a or -ah:

• سوستة → soosta

This ending often appears on feminine nouns. You do not need to translate it separately, but it is part of the word.

The sentence has two main parts:

• السوستة = the thing being talked about
• جنب الزرار = where it is

So the pattern is:

• noun + location phrase

This is one of the most common ways to say where something is in Arabic.

In Egyptian Arabic, the usual way is to add مش:

السوستة مش جنب الزرار.

That means:

• The zipper is not next to the button.

This is the normal everyday negative pattern for this kind of sentence.

It is best understood as Egyptian Arabic.

Clues include:

• جنب being pronounced gamb with a hard g
• the everyday vocabulary السوستة and الزرار

A Standard Arabic sentence might use different pronunciation and possibly different word choices, but this version sounds natural in Egyptian speech.

Yes, you could, and it would still be understood.

But in everyday Egyptian Arabic, جنب الزرار sounds more natural and conversational.
بجانب feels more formal and closer to Standard Arabic.