Kotak kecil itu berisi kancing cadangan.

In Indonesian, adjectives usually come after the noun they describe.

• kotak = box
• kecil = small

So kotak kecil literally looks like box small, but it means small box.

This is very normal in Indonesian:

• rumah besar = big house
• mobil baru = new car
• buku tebal = thick book

In Indonesian, itu commonly comes after the noun phrase when it means that or sometimes the in context.

So:

• kotak itu = that box / the box
• kotak kecil itu = that small box / the small box

The order is: noun + adjective + itu

More examples:

• rumah besar itu = that big house
• baju merah itu = that red shirt

This is one of the most common noun phrase patterns in Indonesian.

It can feel like either one in English, depending on context.

Literally, itu often means that. But in many real sentences, English translates it more naturally as the.

So kotak kecil itu could be understood as:

• that small box
• the small box

If the box is already known in the conversation, English often prefers the. If the speaker is pointing it out or contrasting it with another box, that may fit better.

Berisi means to contain, to be filled with, or to have contents.

In this sentence:

• Kotak kecil itu berisi kancing cadangan.
• The small box contains spare buttons.

It comes from the root isi, which relates to contents or filling.

Very roughly:

• isi = contents / fill
• berisi = contains / is filled with
• mengisi = to fill something

Compare:

• Botol itu berisi air. = That bottle contains water.
• Dia mengisi botol itu dengan air. = He/She filled that bottle with water.

So berisi describes what is inside something.

Because berisi specifically focuses on what something contains.

• Kotak kecil itu berisi kancing cadangan.
  = The small box contains spare buttons.

If you used ada, the meaning would shift:

• Di dalam kotak kecil itu ada kancing cadangan.
  = Inside that small box, there are spare buttons.

Both are natural, but they are structured differently:

• berisi = the box is the subject, and we describe its contents
• ada = we state that something exists inside the box

Indonesian often does not need to mark plural explicitly when the meaning is already clear from context.

So:

• kancing cadangan can mean spare button or spare buttons
• In this sentence, English naturally understands it as plural

Indonesian can use reduplication for plural:

• kancing-kancing = buttons

But that is not always necessary. In fact, leaving the noun unreduplicated is often more natural when plurality is obvious or unimportant.

So:

• berisi kancing cadangan = contains spare buttons
  sounds perfectly normal.

Like many descriptive words in Indonesian, cadangan comes after the noun.

• kancing = button(s)
• cadangan = spare / backup / extra

So:

• kancing cadangan = spare button(s)

This follows the same general pattern: noun + modifier

Examples:

• ban cadangan = spare tire
• uang cadangan = reserve money
• rencana cadangan = backup plan

It is functioning like a modifier meaning spare or backup.

In Indonesian, many words can work flexibly depending on context, and the boundaries between noun/adjective categories are often less rigid than in English.

So in kancing cadangan, it is best understood as:

• cadangan modifying kancing
• meaning spare buttons

You do not need to worry too much about forcing it into a strict English-style part of speech category. The important thing is the pattern and meaning.

Indonesian does not have articles like English a/an/the.

Whether something is:

• indefinite (a box)
• definite (the box)

is usually understood from context, or sometimes from words like itu.

So:

• kotak kecil = a small box / small box
• kotak kecil itu = that small box / the small box

This is very normal in Indonesian, and learners usually need to rely more on context than they do in English.

Yes, but that means something slightly different in structure.

• Kotak kecil itu berisi kancing cadangan.
  = That small box contains spare buttons.
  Here, kecil is part of the noun phrase: the small box

• Kotak itu kecil dan berisi kancing cadangan.
  = That box is small and contains spare buttons.
  Here, kecil is a predicate describing the box.

So both are correct, but they are not identical:

• first = identifies which box
• second = gives information about the box

A simple pronunciation guide is:

Kotak kecil itu berisi kancing cadangan
KOH-tahk keh-CHEEL ee-TOO buh-REE-see KAHN-ching chah-DAH-ngan

A few helpful notes:

• kecil sounds roughly like keh-cheel
• c in Indonesian is pronounced like ch in chair
• ng in kancing and cadangan is like the ng in sing
• Stress in Indonesian is usually fairly even compared with English, so do not over-stress one syllable too strongly

Here is a word-by-word breakdown:

• kotak = box
• kecil = small
• itu = that / the
• berisi = contains / is filled with
• kancing = button(s)
• cadangan = spare / backup

So the structure is:

• Kotak kecil itu = that small box
• berisi = contains
• kancing cadangan = spare buttons

This makes the full sentence:

• Kotak kecil itu berisi kancing cadangan.
  = That small box contains spare buttons.