Ove traperice su udobne, ali mi je remen malo širok.

Because traperice is a feminine plural noun, so the demonstrative must agree with it.

• ovaj = this / these
• feminine plural nominative = ove

So:

• ove traperice = these jeans

A useful thing to remember is that traperice is normally used only in the plural in Croatian, just like jeans in English.

Croatian treats traperice as a plural-only noun (called pluralia tantum). Even though it refers to one pair of jeans, grammatically it behaves as plural.

That is why you get:

• ove traperice
• traperice su
• udobne

This is similar to English these jeans are comfortable, not this jeans is comfortable.

Because the subject traperice is plural, and the adjective also has to agree with it.

• su = are (plural form of to be)
• udobne = feminine plural form of comfortable

Agreement here is:

• traperice → feminine plural
• udobne → feminine plural
• su → plural verb

So Ove traperice su udobne literally matches These jeans are comfortable.

It is in the nominative plural, because it is the subject of the clause.

You can think of it like this:

• ove = nominative plural feminine
• traperice = nominative plural

Since they are the thing being described as comfortable, nominative is the expected case.

This is a very common Croatian way to express possession.

• mi is the dative clitic of ja: to me
• remen = belt

So mi je remen malo širok is literally something like:

• the belt is a little wide to me

But in natural English, that means:

• my belt is a little wide
• or the belt is a little too wide for me

Croatian often uses this dative of possession instead of a possessive adjective like moj.

Compare:

• Moj remen je malo širok. = My belt is a little wide.
• Remen mi je malo širok. = My belt is a little wide. / The belt is a little wide for me.

The version with mi sounds very natural in everyday speech.

Because the subject of the second clause is remen, and remen is singular.

So:

• remen je = the belt is
• not remen su

Even though the first clause has a plural subject (traperice), the second clause has a different subject, so the verb changes accordingly.

Mi is the unstressed dative clitic form of ja.

Forms of ja include:

• nominative: ja = I
• dative: meni / mi = to me

In this sentence, mi does not mean me in the direct-object sense. It marks a relationship like to me / for me / my.

So mi je remen malo širok can be understood as:

• the belt is a little wide for me
• or simply my belt is a little wide

Because Croatian clitics like mi and je usually come near the beginning of the clause, in the so-called second position.

So after ali (but), it is very natural to place the clitics early:

• ali mi je remen malo širok

This sounds much more natural than trying to place mi je later.

Croatian word order is more flexible than English, but clitics have special placement rules, and this sentence follows a very standard pattern.

Malo means a little and širok means wide.

So malo širok means:

• a little wide
• slightly wide
• depending on context, often a bit too wide

With clothing and accessories, Croatian often uses words like širok and uzak in ways that may sound slightly different from the most natural English translation. In context, it usually means the belt does not fit quite right.

Because remen is a masculine singular noun, and the adjective must agree with it.

• širok = masculine singular
• široka = feminine singular
• široko = neuter singular

Since remen is masculine, širok is the correct form.

Yes. In ali mi je remen malo širok, the noun remen is in the nominative and is the thing being described.

Structure:

• mi = to me / my
• je = is
• remen = belt
• malo širok = a little wide

So the core statement is:

• remen je širok = the belt is wide

The mi adds the idea for me / my.

Yes, that is grammatically correct. It would mean essentially the same thing.

However, ali mi je remen malo širok is often more natural and idiomatic in everyday Croatian. Croatian frequently uses the dative clitic for this kind of personal possession, especially when talking about clothing, body parts, and things closely connected to the person.

So:

• moj remen je malo širok = correct, more explicit
• mi je remen malo širok = very natural, common

Because Croatian does not have articles like the or a/an.

So nouns appear without articles:

• traperice = jeans / the jeans
• remen = belt / the belt

Whether English needs the, a, my, or nothing depends on context. Croatian usually expresses that through context, word order, demonstratives, possessives, or case rather than articles.