Essa blusa fica bem com calça jeans.

In Brazilian Portuguese, essa is much more common in everyday speech than esta.

• essa blusa = that blouse / often also this blouse in real conversation
• esta blusa is grammatically correct, but it can sound more formal or less natural in many casual situations

In Brazil, the distinction between este/esta and esse/essa is often weaker in spoken language than it is in formal grammar.

Blusa usually refers to a women’s top, blouse, or sometimes a light sweater depending on context.

It does not always match English blouse perfectly. In Brazilian Portuguese, blusa can be used quite broadly for upper-body clothing.

So in this sentence, essa blusa could mean:

• this blouse
• this top
• sometimes even this sweater/shirt, depending on what kind of clothing is being discussed

Portuguese often uses ficar bem com to express that something looks good with something else.

So:

• Essa blusa fica bem com calça jeans. = This blouse looks good with jeans. = This blouse goes well with jeans.

Literally, ficar often means to stay or to become, but in clothing contexts, ficar bem means to suit, to look good, or to go well.

Ficar bem com means to look good with, to go well with, or to suit.

Pattern:

• [thing/person] + fica bem com + [other thing]

Examples:

• Essa camisa fica bem com essa saia. = This shirt goes well with that skirt.
• Azul fica bem com branco. = Blue goes well with white.

It is a very common expression when talking about clothes, colors, and appearance.

Because the subject is singular: essa blusa.

• essa blusa = singular
• so the verb is fica

Compare:

• Essa blusa fica bem com calça jeans.
• Essas blusas ficam bem com calça jeans.

So the verb agrees with blusa, not with calça jeans.

Portuguese often omits the article when speaking generally about a type of clothing.

So:

• fica bem com calça jeans = looks good with jeans / with jean pants
• this sounds general, not about one specific pair

If you add an article, the meaning becomes more specific:

• com uma calça jeans = with a pair of jeans
• com a calça jeans = with the jeans / with that specific pair of jeans

Without the article, it has a broader, more natural general styling meaning.

In Brazilian Portuguese, calça jeans is a very common way to say jeans.

• calça = pants
• jeans describes the material/style

So calça jeans literally means something like jean pants, but in natural English it usually translates simply as jeans.

You may also hear:

• calças jeans
• sometimes just jeans, depending on the speaker and region

Grammatically, calça is singular here.

That can feel strange to English speakers because pants and jeans are usually plural in English. But in Portuguese:

• a calça = the pants / one pair of pants
• as calças = the pants / pants in plural

So calça jeans can refer to a pair of jeans even though it is singular in Portuguese.

Yes. Combinar com is also very common and natural.

• Essa blusa combina com calça jeans. = This blouse matches/goes with jeans.

The difference is small:

• fica bem com focuses a bit more on looking good with
• combina com focuses a bit more on matching/going together

In many everyday situations, both work well.

Bem means well.

In fica bem com, it helps express the idea that something looks good or works well with something else.

Compare:

• fica com = just goes with / is with, depending on context
• fica bem com = looks good with
• fica mal com = looks bad with

So bem is important because it adds the positive evaluation.

Yes.

It can describe how clothes look on a person, or how something suits someone.

Examples:

• Essa cor fica bem em você. = That color looks good on you.
• Esse corte de cabelo fica bem nela. = That haircut suits her.

So ficar bem is useful for clothes, colors, hairstyles, accessories, and appearance in general.

Usually, no—not in this sentence.

• ficar bem com = to go well with something
• ficar bem em alguém = to look good on someone

So:

• Essa blusa fica bem com calça jeans. = the blouse goes well with jeans
• Essa blusa fica bem em você. = the blouse looks good on you

So com and em are both possible with ficar bem, but they are used in different situations.

Yes, it is natural and correct.

It sounds like a normal everyday comment about clothing and style. A Brazilian speaker might also say:

• Essa blusa combina com calça jeans.
• Essa blusa fica boa com calça jeans.
• Essa blusa fica bem com jeans.

All of these are natural, but Essa blusa fica bem com calça jeans is perfectly good Brazilian Portuguese.