Я хочу приміряти цей розмір.

A quick breakdown:

• Я = I
• хочу = want
• приміряти = to try on
• цей = this
• розмір = size

So the structure is:

• Я хочу + infinitive = I want to + verb
• цей розмір = this size

This is a very normal Ukrainian sentence pattern.

Because it follows хочу (I want).

In Ukrainian, after verbs like хочу (want), you normally use the infinitive:

• Я хочу читати. = I want to read.
• Я хочу купити це. = I want to buy this.
• Я хочу приміряти цей розмір. = I want to try on this size.

English uses to before the second verb; Ukrainian does not need a separate word like that here.

Because приміряти already includes that meaning.

In English, try and try on are different.
In Ukrainian, приміряти specifically means to try on clothes, shoes, etc.

So:

• пробувати = to try, attempt
• приміряти = to try on

You do not need an extra word meaning on.

Because розмір is a masculine singular noun.

The demonstrative this has to agree with the noun in gender, number, and case:

• цей = masculine singular
• ця = feminine singular
• це = neuter singular
• ці = plural

Since розмір is masculine singular, the correct form is цей розмір.

It is in the accusative case, because it is the direct object of приміряти.

However, for many inanimate masculine nouns in Ukrainian, the accusative looks exactly like the nominative. That is why you see:

• nominative: цей розмір
• accusative: цей розмір

So even though the function is different, the form stays the same.

Because Ukrainian has no articles.

English needs words like a and the, but Ukrainian usually does not. Context does that job.

Here, цей already makes the noun specific:

• цей розмір = this size

If you removed цей, then розмір could mean a size or the size, depending on context.

Yes, it is natural in a shopping context.

In English, people often say:

• I want to try this size on
• I want to try on this size
• I want to try the item in this size

Ukrainian can also use розмір this way, where the clothing item is understood from context. So the sentence is fine in a store.

If you want to be more explicit, you could say something like:

• Я хочу приміряти цю сукню в цьому розмірі. = I want to try this dress in this size.

Yes. Ukrainian word order is more flexible than English word order.

The most neutral version is:

• Я хочу приміряти цей розмір.

But you could also say:

• Цей розмір я хочу приміряти.

That puts more emphasis on this size.

For learners, it is best to use Я хочу приміряти цей розмір until you get comfortable with emphasis and style.

In this sentence, no.

Both a man and a woman say:

• Я хочу приміряти цей розмір.

That is because хочу is a present-tense form and does not show the speaker’s gender.

Gender becomes visible in forms like the past tense or conditional:

• Я хотів би приміряти цей розмір. = said by a man
• Я хотіла б приміряти цей розмір. = said by a woman

Yes. A few common polite options are:

• Я хотів би приміряти цей розмір. = male speaker
• Я хотіла б приміряти цей розмір. = female speaker
• Можна приміряти цей розмір? = May I try on this size?

These sound softer and more natural in a customer-service situation than the plain Я хочу..., although Я хочу приміряти цей розмір is still understandable.

Sometimes, yes, but there are differences.

• приміряти = the standard verb for try on
• примірювати = the imperfective form, more like to be trying on / to try on repeatedly
• міряти = usually to measure, though in casual speech some people also use it for trying on clothes
• поміряти = often used conversationally for trying something on, but it can sound less precise than приміряти

For a learner, приміряти is the safest and clearest choice in a shop.

Using цей makes the sentence more specific: this size.

That usually means the speaker is pointing to, choosing, or referring to one particular size among several options.

Compare:

• Я хочу приміряти розмір M. = I want to try size M on.
• Я хочу приміряти цей розмір. = I want to try this size on.

So цей works a lot like English this when you are selecting something nearby or already being discussed.