La scarpa calza bene.

Here calza is the verb calzare, and in this sentence it means to fit, especially for shoes or other things you wear.

So La scarpa calza bene means that the shoe fits well.

This is a more specific verb than a very general English fit, because calzare is especially used for footwear and, by extension, clothing or wearable items.

Yes, calza can be both:

• calza = he/she/it fits or puts on from the verb calzare
• calza = a noun meaning stocking or sometimes sock in certain contexts

In La scarpa calza bene, it is clearly a verb, because it comes after the subject La scarpa and describes what the shoe does.

So:

• la calza = the stocking
• calza bene = fits well

In Italian, it is very normal to make the item of clothing or footwear the subject of the verb.

So Italian says, literally:

• The shoe fits well
• This jacket fits badly
• These trousers fit perfectly

That pattern is very natural in Italian:

• La scarpa calza bene.
• La giacca veste bene.
• I pantaloni stanno bene.

You can also mention the person with an indirect object pronoun:

• La scarpa mi calza bene = The shoe fits me well

So the shoe is the grammatical subject, and the person can be added if needed.

Italian often uses the singular when talking about a shoe as a type, model, or item in a general or practical sense.

So La scarpa calza bene can mean:

• the shoe fits well
• this shoe fits well
• this kind/model of shoe fits well

If you are talking about an actual pair in a more everyday way, you might also hear:

• Le scarpe calzano bene = The shoes fit well

Both singular and plural are possible, depending on context.

The singular is especially common when talking about:

• a model of shoe
• a particular shoe in a shop
• footwear in a more general/product-description way

Because bene is an adverb, and it modifies the verb calza.

You are saying fits well, not is good.

Compare:

• La scarpa calza bene = The shoe fits well
• La scarpa è buona = The shoe is good

In the first sentence, bene tells you how the shoe fits. That is why you need an adverb, not an adjective.

Sometimes, yes, but the meaning is a bit different.

• calzare bene focuses on fit, especially the physical fit of footwear
• stare bene often means to suit someone or to look good on someone, though it can sometimes overlap with fit

So:

• La scarpa calza bene = The shoe fits well
• La scarpa mi sta bene = The shoe looks good on me / suits me / fits me well, depending on context

For precise physical fit, calzare is especially useful with shoes.

It depends on what you want to say.

• La scarpa calza bene = The shoe fits well
  This is a general statement.
• La scarpa mi calza bene = The shoe fits me well
  This explicitly says me.

Italian often leaves out the person if it is obvious or not important. If you want to make it personal, add the indirect object pronoun:

• mi = me
• ti = you
• gli / le = him / her
• ci = us
• vi = you all
• gli = them

Example:

• Queste scarpe mi calzano bene. = These shoes fit me well.

It is used most naturally with shoes, but it can also be used more broadly for things you wear.

For example, it can refer to:

• shoes
• boots
• gloves
• hats
• sometimes clothing, depending on style and context

Still, it is especially associated with footwear. For clothing in general, other verbs are often more common, such as:

• vestire = to fit/dress
• stare bene = to suit/look good on

So calzare is a good verb to learn as a particularly shoe-related way to say fit.

Calza is the third person singular present indicative of calzare.

So:

• io calzo = I fit / I put on
• tu calzi = you fit
• lui/lei calza = he/she/it fits
• noi calziamo
• voi calzate
• loro calzano

In La scarpa calza bene, the subject is singular (la scarpa), so the verb is singular too: calza.

Yes, it is natural, especially in contexts like:

• shopping
• product descriptions
• talking about how a shoe fits

That said, in everyday conversation Italians may often say things like:

• Mi stanno bene.
• Mi vanno bene.
• Mi calzano bene.

depending on the situation.

So La scarpa calza bene is correct and natural, but it can sound a little more descriptive or product-focused than a very casual everyday comment.

A useful approximation is:

KAL-tsa

Notes:

• ca- sounds like ka
• -lza has a ts sound: tsa

So the whole sentence is roughly:

la SKAR-pa KAL-tsa BEH-ne

Not perfect IPA, but good enough for most learners.

Yes. Like English fit, Italian calzare can also be used figuratively.

For example:

• Questa spiegazione non calza. = This explanation doesn’t fit.
• L’esempio calza perfettamente. = The example fits perfectly.

So the core idea is still fit, whether literally or figuratively. But in your sentence, it is the literal, physical meaning.