Портной сделал ровные стежки и застрочил карман.

Портной means tailor, and here it is in the nominative singular, because it is the subject of the sentence.

The ending -ой is just part of this word’s normal dictionary form: портно́й. It looks a bit like an adjective ending, but in this sentence it functions as a noun meaning a person.

Both are past tense, masculine, singular verb forms.

In Russian, past-tense verbs in the singular agree with the subject in gender:

• masculine: сделал
• feminine: сделала
• neuter: сделало

Since портной is masculine, the sentence uses сделал and застрочил.

Because the sentence describes completed actions with a clear result.

• сделал = did/made, completed
• застрочил = stitched up / sewed up, completed

If you used imperfective forms, the focus would be more on the process, repetition, or background:

• делал = was doing / used to do
• an imperfective partner of застрочил would suggest ongoing or repeated action rather than a finished result

So this sentence presents the tailor as having finished both actions.

Ровные стежки means even / neat / regular stitches.

The adjective ровные is in the plural because стежки is plural. Adjectives in Russian must agree with the nouns they describe in number, gender (when relevant), and case.

Here the whole phrase is the direct object of сделал, so it is in the accusative plural. But because стежки is an inanimate plural noun, its accusative form looks the same as the nominative.

The dictionary form is стежок, meaning a stitch.

So:

• стежок = stitch
• стежки = stitches

This is a normal singular/plural pattern in Russian, even though the form changes a bit.

Because стежки is an inanimate plural noun.

In Russian:

• animate plural accusative usually looks like the genitive plural
• inanimate plural accusative usually looks like the nominative plural

So here:

• nominative plural: стежки
• accusative plural: стежки

That is why the form does not change.

Yes, it is natural.

Russian often uses сделать in places where English might say make, do, or use a more specific verb. So сделать стежки means to make/sew stitches.

It emphasizes the result: the stitches were successfully made.

Застрочить is a sewing verb. Depending on context, it can mean things like:

• to stitch up
• to sew shut
• to run a line of stitching
• to sew over/by machine

The prefix за- often adds a sense of finishing, covering, or closing something by stitching. So застрочил карман suggests that the tailor stitched the pocket, very often with the idea of stitching it closed or sewing it with a line of machine stitching.

Because it is the direct object of застрочил, so it is in the accusative case.

But карман is a masculine singular inanimate noun, and for that type of noun the accusative form is the same as the nominative:

• nominative: карман
• accusative: карман

So the case changes by function, not by visible form here.

Yes. Russian word order is fairly flexible.

This sentence has a neutral, straightforward order:

• Портной сделал ровные стежки и застрочил карман.

But you could rearrange it for emphasis, for example:

• Портной застрочил карман и сделал ровные стежки.
• Ровные стежки портной сделал и застрочил карман.

The core meaning stays similar, but the emphasis or information flow changes.

The standard stresses are:

• портно́й
• сде́лал
• ро́вные
• стежки́
• застрочи́л
• карма́н

The conjunction и is normally unstressed.

Because Russian has no articles.

So Портной can mean the tailor or a tailor, depending on context. The same is true for карман: it could be the pocket or a pocket in English translation.

English has to choose an article, but Russian usually does not mark that difference directly.