A méret jó.

A is the Hungarian definite article, usually equivalent to English the.

So:

• a méret = the size

Hungarian has two forms of the definite article:

• a before consonant sounds
• az before vowel sounds

Because méret starts with m, Hungarian uses a: a méret.

In Hungarian, the verb to be is often omitted in the present tense, third person.

So English:

• The size is good

becomes Hungarian:

• A méret jó.

This is completely normal.

You would only normally say van (is) in other kinds of situations, not in a simple sentence like this. For example:

• A méret jó. = The size is good.
• not usually: A méret van jó. ✘

This missing is is one of the most important basic patterns in Hungarian.

Méret is a noun. It means size.

So the structure is:

• a méret = the size
• jó = good

Literal order:

• The size good.

But natural English translation:

• The size is good.

Jó usually means good, but like English good, its exact meaning depends on context.

In A méret jó, it can mean things like:

• the size is good
• the size is fine
• the size is suitable
• the size is right

So jó can sometimes sound broader than just moral or general goodness. It often means acceptable, appropriate, or works well in context.

A simple English-friendly guide:

• méret ≈ MAY-ret
• jó ≈ yoh

A few important pronunciation points:

• é is a long vowel, roughly like ay in say
• e in Hungarian is not exactly English eh, but méret is often approximated as MAY-ret
• j in Hungarian sounds like English y
• ó is a long o

Also, Hungarian stress is normally on the first syllable of each word:

• MÉ-ret
• JÓ

The accent marks show vowel quality and length, and they matter in Hungarian spelling and pronunciation.

Here:

• é is different from e
• ó is different from o

These are not optional marks. They are part of the word.

For a learner, the key idea is:

• accented vowels are pronounced differently from unaccented ones
• many accented vowels are also longer

So you should learn the words as:

• méret, not meret
• jó, not jo

Yes, Jó a méret is also possible, but it shifts the emphasis.

• A méret jó. = neutral statement: The size is good.
• Jó a méret. = puts more focus on good; something like The size is good / The size is fine.

Hungarian word order is often connected to focus and information structure, not just rigid grammar rules.

So both can be correct, but they may sound slightly different in emphasis.

Hungarian often uses the definite article in places where English also uses the, and sometimes even where English might leave it out depending on context.

In this sentence, a méret means the size, referring to a specific size already understood from the situation, for example:

• a piece of clothing
• a shoe
• a box
• a screen setting

If you said just Méret jó, that would not sound like a normal complete sentence.

Yes, very naturally. A méret jó. is the kind of sentence you could use when talking about fit or suitability.

For example:

• trying on clothes
• checking shoe size
• discussing dimensions of an object

Depending on context, it can mean:

• The size is good
• The size is fine
• The size is right

So it is short, natural, and useful in everyday conversation.

Not always. In this sentence, jó comes after méret because it is part of the predicate:

• A méret jó. = The size is good.

But when an adjective directly modifies a noun, it usually comes before the noun:

• jó méret = a good size

So compare:

• A méret jó. = The size is good.
• Ez jó méret. = This is a good size.

That is an important difference:

• before the noun = adjective modifying the noun
• after the noun in a sentence like this = predicate adjective