Beden tablosu deneme kabininin yanında.

Because Turkish often omits the present-tense form of to be in simple statements.

So:

• Beden tablosu deneme kabininin yanında. = The size chart is next to the fitting room.

In English, you need is. In Turkish, in a sentence like this, you usually do not say it.

If you want to make it explicit in other tenses, Turkish does use forms equivalent to was / will be, etc., but in the simple present, third person, it is commonly left out.

Beden tablosu means size chart.

Literally:

• beden = size, clothing size
• tablo = table, chart

The form tablosu is not random. This is a very common Turkish noun pattern where one noun modifies another:

• beden tablosu = size chart
• compare with things like okul kapısı = school door, telefon numarası = phone number

In this pattern, the second noun usually takes a suffix like -ı / -i / -u / -ü (or -sı / -si / -su / -sü after vowels).

So:

• tablo
  • -su → tablosu

That does not mean his/her chart here. In this phrase, it is just part of the standard noun-compound structure.

Because the sentence uses the expression X-in yanında, which means next to X or more literally at X’s side.

Breakdown:

• deneme kabini = fitting room / changing booth
• deneme kabininin = of the fitting room
• yanında = at its side / next to it

So:

• deneme kabininin yanında = next to the fitting room

This is a possessive-type structure in Turkish:

• evin yanında = next to the house
• okulun yanında = next to the school
• deneme kabininin yanında = next to the fitting room

So -in / -ın / -un / -ün here is the genitive ending on the thing being referred to.

Yanında means next to, beside, or literally at its side.

It comes from:

• yan = side
• yanı = its side
• yanında = at/on/by its side

This word often works together with a preceding genitive noun:

• mağazanın yanında = next to the store
• kapının yanında = next to the door
• deneme kabininin yanında = next to the fitting room

So in this sentence, yanında is the location expression.

Yes, you could.

The original sentence:

• Beden tablosu deneme kabininin yanında.

puts beden tablosu first, so the topic is the size chart.

You could also say:

• Deneme kabininin yanında beden tablosu var.
• Deneme kabininin yanında beden tablosu. (less complete-feeling to many learners, though possible in context)

A very natural full version would be:

• Deneme kabininin yanında beden tablosu var. = There is a size chart next to the fitting room.

So the difference is often about focus and style:

• Beden tablosu deneme kabininin yanında. = The size chart is next to the fitting room.
• Deneme kabininin yanında beden tablosu var. = There is a size chart next to the fitting room.

Both are natural, but they present the information a little differently.

Yes, more or less.

Breakdown:

• deneme = trying, trying on
• kabin = cabin, booth

So deneme kabini is the place where you try clothes on, usually translated as:

• fitting room
• changing room
• fitting booth

In stores, deneme kabini is very common Turkish.

Because two things are happening.

First:

• deneme kabini is a noun compound, and the second noun gets a suffix:
  • kabin → kabini

Then, because the whole phrase needs the genitive for yanında, it takes another ending:

• deneme kabini
  • -nin → deneme kabininin

So this is not one giant unexplained ending. It is built in steps:

1. kabin
2. kabini = fitting room / trying booth
3. kabininin = of the fitting room

This kind of stacking is very normal in Turkish.

Here, beden means size, especially clothing size.

Turkish beden can mean:

• body in some contexts
• size in clothing contexts

So in a shop, beden tablosu is definitely understood as size chart, not body chart.

Context matters a lot.

Turkish does not use articles like the and a/an the way English does, so the phrase can be interpreted from context.

• Beden tablosu deneme kabininin yanında. could mean:
  • The size chart is next to the fitting room.
  • or, in some contexts, A size chart is next to the fitting room.

In English, you must choose the or a. In Turkish, very often you do not mark that distinction directly.

In this sentence, the size chart is probably the most natural translation if both speaker and listener already know which chart is meant.

Yes, and it changes the structure slightly.

Compare:

• Beden tablosu deneme kabininin yanında. = The size chart is next to the fitting room.

• Deneme kabininin yanında beden tablosu var. = There is a size chart next to the fitting room.

The version with var is especially natural when you are introducing the existence of something in a place.

So:

• X yanında. = It is next to X.
• X yanında ... var. = There is ... next to X.

Both are correct, but they are framed differently.

Yes, it is natural and understandable, especially in a store context.

That said, in real life, you might also see or hear slightly different versions, such as:

• Beden tablosu deneme kabininin yanındadır.
  A bit more formal or written, with an explicit copular ending.

• Deneme kabininin yanında beden tablosu var.
  Very natural in speech.

• Beden tablosu deneme kabini yanında.
  Sometimes heard in less careful speech/signage, though the more grammatical form is deneme kabininin yanında.

So the given sentence is good Turkish and something a learner should understand well.