Yo prefiero una pulsera pequeña, pero mi hermana quiere unos pendientes más grandes.

Yes — Spanish often drops subject pronouns because the verb ending already shows who is doing the action.

So Prefiero una pulsera pequeña is perfectly natural.

Here, yo is probably included for emphasis or contrast, especially because the sentence compares two people:

• Yo prefiero...
• pero mi hermana quiere...

So yo helps highlight the contrast between I and my sister.

Because preferir is a stem-changing verb.

In the present tense, the e in the stem changes to ie in most forms:

• yo prefiero
• tú prefieres
• él/ella prefiere
• nosotros/nosotras preferimos
• vosotros/vosotras preferís
• ellos/ellas prefieren

So prefiero is the correct yo form.

They are different verbs:

• prefiere / prefiero = prefers / prefer
• quiere = wants

So the sentence is not saying both sisters “prefer” something. It says:

• I prefer a small bracelet
• but my sister wants larger earrings

Also, querer is another stem-changing verb:

• yo quiero
• tú quieres
• él/ella quiere

In Spanish, adjectives usually come after the noun.

So:

• una pulsera pequeña = a small bracelet

This is the normal order in Spanish:

• noun + adjective

Putting the adjective before the noun is sometimes possible, but it often sounds more literary, emotional, or changes the nuance. For a basic descriptive sentence, pulsera pequeña is the standard choice.

Because adjectives in Spanish usually agree with the noun in gender and number.

• pulsera is a feminine singular noun
• so the adjective must also be feminine singular

That gives:

• una pulsera pequeña

Compare:

• un collar pequeño = a small necklace
• unas pulseras pequeñas = some small bracelets

In this context, unos pendientes usually means a pair of earrings or simply some earrings.

A few key points:

• pendientes is normally used in the plural for earrings
• unos is the plural indefinite article, like some
• In natural English, we often translate it as a pair of earrings, even though Spanish literally uses the plural form

So unos pendientes is a normal way to say some / a pair of earrings.

Because the noun pendiente is grammatically masculine:

• el pendiente
• los pendientes

Even though earrings may come as a pair and the object itself has no biological gender, Spanish nouns still have grammatical gender. So the article and adjectives must match that grammatical gender:

• unos pendientes grandes
• unos pendientes más grandes

Because grandes describes pendientes, which is plural.

Spanish adjectives must agree in number with the noun:

• singular: un pendiente más grande
• plural: unos pendientes más grandes

So here:

• pendientes = plural
• therefore grandes = plural too

Más grandes means bigger or larger.

It is the comparative form:

• grande = big / large
• más grande = bigger / larger
• más grandes = bigger / larger, plural

It does not need que here because the thing being compared is understood from context. The sister wants earrings that are bigger than some other option.

If you wanted to state the full comparison, you could say something like:

• unos pendientes más grandes que esos = earrings bigger than those

Because possessives like mi, tu, su, nuestro usually come instead of an article, not with one.

So you say:

• mi hermana = my sister
• mi pulsera = my bracelet

Not normally:

• la mi hermana ❌

This is different from English only in structure, since English also says my sister, not the my sister.

Pero is the common word for but in Spanish. It connects two contrasting ideas:

• Yo prefiero una pulsera pequeña
• pero mi hermana quiere unos pendientes más grandes

So it marks a contrast between what I prefer and what my sister wants.

In most everyday cases, pero = but.

Yes, absolutely:

• Prefiero una pulsera pequeña, pero mi hermana quiere unos pendientes más grandes.

This sounds very natural in Spanish.

Spanish often leaves out subject pronouns unless they are needed for:

• emphasis
• contrast
• clarity

Including yo is not wrong at all — it just makes the contrast a bit more explicit.

Yes. In Spain, pendientes is the standard everyday word for earrings.

This is useful because in other Spanish-speaking regions you may hear different words, such as:

• aretes
• zarcillos
• aros in some contexts

But for Spanish from Spain, pendientes is the best word to learn here.