Celana ini terlalu ketat untuk saya.

In Indonesian, celana normally means pants / trousers as a single item of clothing.
Even though English uses a plural form (pants, trousers), Indonesian treats celana as a normal singular noun.

So:

• celana = pants / trousers
• sebuah celana is uncommon; people usually just say celana
• if needed, context tells you whether it means one pair or more than one

If you want to be extra clear, you can say things like:

• sepasang celana = a pair of pants

But in everyday speech, celana by itself is completely normal.

In Indonesian, demonstratives like ini and itu usually come after the noun.

So:

• celana ini = these pants / these trousers
• rumah itu = that house
• buku ini = this book

This is the normal Indonesian pattern:

• noun + ini
• noun + itu

So celana ini literally follows the Indonesian word order pants these, but in natural English it becomes these pants.

Terlalu means too in the sense of more than is good, comfortable, or suitable.

So:

• terlalu ketat = too tight

This is different from sangat, which means very.

Compare:

• Celana ini sangat ketat. = These pants are very tight.
• Celana ini terlalu ketat. = These pants are too tight.

So terlalu suggests there is a problem.
It means the tightness is excessive.

Ketat means tight.

It can be used for clothes, rules, schedules, and more, depending on context. In this sentence, it clearly refers to clothing:

• baju ketat = a tight shirt
• celana ketat = tight pants

In Celana ini terlalu ketat untuk saya, ketat describes how the pants fit.

Indonesian often leaves out the verb to be in simple present-tense sentences.

So instead of saying something like:

• Celana ini are too tight...

Indonesian simply says:

• Celana ini terlalu ketat...

This is very normal.
A literal word-for-word breakdown would be:

• celana ini = these pants
• terlalu ketat = too tight
• untuk saya = for me

So the sentence works without any separate word for are.

Yes, untuk saya literally means for me.

In this sentence, it means for me to wear or for my size/body. So the natural English meaning is:

• These pants are too tight for me.

It does not mean someone is giving the pants to you.
It means the pants are not suitable for you because of the fit.

You can think of it as:

• untuk saya = for me / on me / for my body

Yes. Buat saya is very common in everyday Indonesian and often means the same thing here.

So you may hear:

• Celana ini terlalu ketat untuk saya.
• Celana ini terlalu ketat buat saya.

Both can mean These pants are too tight for me.

The difference is mainly style:

• untuk = a bit more neutral or formal
• buat = more conversational / informal

Because this sentence is a full statement, not just a noun phrase.

Here, the structure is:

• Celana ini = the subject, these pants
• terlalu ketat = the predicate, too tight
• untuk saya = for me

So the sentence means:

• These pants are too tight for me.

If you said celana ketat ini, that would mean:

• these tight pants

That is just a noun phrase, not a complete statement about the pants being too tight.

Compare:

• Celana ini terlalu ketat. = These pants are too tight.
• celana ketat ini = these tight pants

Yes, but the tone changes.

• saya = neutral, polite, standard
• aku = informal, personal, casual

So:

• Celana ini terlalu ketat untuk saya. = neutral/polite
• Celana ini terlalu ketat untuk aku. = understandable, but less standard in formal speech

In everyday conversation, many speakers might prefer:

• Celana ini terlalu ketat buat aku.

That sounds natural and casual.

In natural English, these pants is usually the best translation.

Because English treats pants as plural, we say:

• these pants
• the pants are too tight

But Indonesian does not work that way, so:

• celana ini literally looks singular in Indonesian structure
• natural English translation is still these pants

Sometimes this pair of pants also works in English, but these pants is usually the most natural.

You can say:

• Celana ini tidak terlalu ketat untuk saya.

That means:

• These pants are not too tight for me.

Notice that tidak is used to negate the adjective phrase:

• terlalu ketat = too tight
• tidak terlalu ketat = not too tight

If you say:

• Celana ini tidak ketat untuk saya.

that means:

• These pants are not tight for me.

That is a slightly different idea from not too tight.

Yes. A very common alternative is:

• Celana ini kekecilan buat saya.

This also means:

• These pants are too small/tight for me.

The nuance is a little different:

• terlalu ketat focuses on the pants being too tight
• kekecilan focuses on the pants being too small

Both can fit the same situation.

So if a learner hears either one, the basic idea is similar: the pants do not fit comfortably.