Elegimos el tamaño del geocaché para el caché tradicional.

Elegimos is the first-person plural form of elegir, so it means we choose / we select.

A useful detail: elegimos can also be the preterite form (we chose). So by itself, it is ambiguous between present and past. Usually the wider context tells you which meaning is intended.

Also, Spanish often leaves out the subject pronoun, so nosotros elegimos is usually shortened to just elegimos.

Spanish often omits subject pronouns because the verb ending already shows who is doing the action.

• elegimos = we choose / we chose

So nosotros is not necessary unless you want to add emphasis, contrast, or clarity.

For example:

• Elegimos el tamaño... = normal
• Nosotros elegimos el tamaño... = more emphatic, like we are the ones who choose the size

Spanish uses the definite article more often than English does.

In this sentence:

• el tamaño = the size
• del geocaché = of the geocache
• el caché tradicional = the traditional cache

Even if English might sometimes sound more natural without all those the words, Spanish usually keeps them when talking about a specific thing or category.

Because de + el contracts to del in Spanish.

So:

• de + el geocaché → del geocaché

This is a standard contraction and is almost always required.

Compare:

• el libro del profesor = the teacher’s book / the book of the teacher

One exception to remember: de + él does not contract, because él is a pronoun, not an article.

Here para means something like for in the sense of intended for or meant for.

So:

• para el caché tradicional = for the traditional cache

It tells you the category or purpose.

This is why para works better than por here.
Por usually expresses ideas like through, because of, by, or in exchange for, which would not fit this sentence.

In Spanish, most descriptive adjectives come after the noun.

So:

• caché tradicional = traditional cache

That is the normal word order. English usually puts the adjective before the noun, but Spanish often puts it after.

In this context, geocaché is the full word for a geocache, while caché is a shortened form referring to the same general idea.

So:

• tamaño del geocaché = size of the geocache
• caché tradicional = traditional cache

The second phrase uses the shorter term because the context already makes it clear that we are talking about geocaching, not some other kind of cache.

The accent mark shows where the stress goes:

• caché is stressed on the last syllable

Without the accent, Spanish pronunciation rules would suggest a different stress pattern.

The same idea applies to geocaché, where the written accent helps show the correct pronunciation in Spanish spelling.

Tamaño means size.

The letter ñ is a separate letter in Spanish and is pronounced roughly like the ny sound in canyon.

So tamaño is pronounced approximately like ta-MA-nyo.

This is important because n and ñ are different letters and can change meaning.

Yes, in many contexts escogemos and elegimos are both possible and both can mean we choose or we select.

Very generally:

• elegir often sounds like choose/select
• escoger also means choose/pick

In many everyday sentences, the difference is small or nonexistent.
In this sentence, elegimos sounds completely natural.

By itself, it could be understood in more than one way, depending on context.

Because elegimos can be either:

• present: we choose / we select
• preterite: we chose

So the sentence could describe:

• a general or current action
• a completed past action

Also, in instructions, menus, or app text, Spanish often uses the present tense where English might also use present wording such as we select or we choose. Context is what resolves it.