tiisai hibi ga aru.

It is read:

chiisai hibi ga aru

A more natural Japanese written form would usually be:

小さいひびがある。

The spaces are just there to help learners read it.

Here, ひび means a crack or a small fissure.

For example, it could refer to:

• a crack in glass
• a crack in a wall
• a crack in pottery

So 小さいひび means a small crack.

小さい is an i-adjective, and i-adjectives can directly modify nouns.

So:

• 小さい = small
• ひび = crack
• 小さいひび = a small crack

This works just like:

• 大きい犬 = a big dog
• 新しい本 = a new book

Yes, 小さなひび is also possible.

Both can mean a small crack, but there is a slight nuance:

• 小さいひび: more straightforward, descriptive
• 小さなひび: can sound a little more literary, softer, or stylistically marked

For everyday learning, 小さいひび is perfectly normal and easy to understand.

が marks what exists in this sentence.

The structure is:

[thing] が ある = there is [thing]

So:

• 小さいひびがある = There is a small crack

With ある, the thing that exists is usually marked by が.

ある is the verb used for the existence of non-living things.

Since a crack is not alive, Japanese uses ある, not いる.

Compare:

• 本がある = There is a book.
• 犬がいる = There is a dog.

So:

• ひびがある = There is a crack.

Because いる is used for living beings that are animate, such as:

• people
• animals

A crack is an inanimate thing, so Japanese uses ある.

So these are correct:

• 猫がいる = There is a cat.
• ひびがある = There is a crack.

Yes, very possibly.

Japanese often omits information that is understood from context.
For example, this sentence could really mean:

• There is a small crack in it.
• There is a small crack here.
• It has a small crack.

The location or topic may be omitted if it is already obvious.

For example:

• コップに小さいひびがある。 = There is a small crack in the cup.
• この皿には小さいひびがある。 = This plate has a small crack.

So the short sentence by itself is natural if the context already tells you what you are talking about.

Yes, in translation it often ends up that way.

Literally, 小さいひびがある is:

There is a small crack.

But in natural English, depending on context, you might say:

It has a small crack.

Japanese often uses an existence structure where English uses have.

For example:

• 問題がある = There is a problem / It has a problem
• 傷がある = There is a scratch / It has a scratch
• ひびがある = There is a crack / It has a crack

Sometimes, yes, but it changes the feel.

• 小さいひびがある = There is a small crack.
  This sounds like introducing or pointing out the existence of the crack.

• 小さいひびはある = As for a small crack, there is one / There is, at least, a small crack.
  This sounds more contrastive or emphatic.

In basic existence sentences, が is the most neutral and standard choice.

Yes, it is natural, especially in context.

However, depending on the situation, native speakers might also say:

• 小さなひびがある。
• ひびが入っている。
• 小さいひびが入っている。

ひびがある focuses on the existence of the crack.
ひびが入っている often sounds a bit more like it is cracked or a crack has formed.

Both are common.

Both can describe a crack, but the nuance is a little different:

• ひびがある = there is a crack
• ひびが入っている = a crack has formed / it is cracked

ひびがある is simpler and focuses on existence.
ひびが入っている focuses more on the state of having a crack in it.

For example, with glass or dishes, ひびが入っている is very common.

Japanese often does not state subjects when they are clear from context.

English usually needs something like:

• It has a small crack.

Japanese can simply say:

• 小さいひびがある。

If everyone knows what object is being discussed, there is no need to say it explicitly.

Yes. It is often written as:

罅 or 皹

However, these kanji are uncommon in everyday writing, so ひび in hiragana is very normal and often preferred.

So learners should not be surprised if they mostly see:

ひび

instead of rare kanji.

The pattern is:

[adjective + noun] が ある

In this sentence:

• 小さい = adjective
• ひび = noun
• が = marks the thing that exists
• ある = exists / there is

So the whole structure is:

小さいひびがある = There is a small crack.

This is a very useful beginner pattern.