Does size of chess board matter in offline games?

Is it true that 14 inches chess board is better than 17/20 inches chess board as we can see board clearly and have vision on each block of board.

Do you mean "over the board" games played with a physical set and board?

Normally, you just sit on one side of the board and don't get to wander around and look at the board from every perspective.

This is a guide that talks about tournament chess set sizes:

https://www.chess.com/article/view/chess-board-dimensions

A 17 inch board would be about the minimum to use in a tournament.   The normal tournament board is 20 inches with 2.25" squares.  14 inches would be too small.    

But if you are talking about your own set for use by you for analysis, then it is completely up to you and your preferences.

@1

3.3     The side of the square should measure 5-6 cm. Four pawns should fit on one square.
https://handbook.fide.com/chapter/StandardsOfChessEquipment2022 

yeah, I am talking about physical board.

or you can just suggest the size of physical board used in high level games.

Size doesn’t matter. That's what she said.

As far as  a s c e t i c s , the pieces and the board should be proportional, with the king's height being 40 ~ 50% of the king's base, and the square being 75 ~ 80% of the king's base diameter.  

As far as not being able to see the pieces, I have no problem playing on 12 inch to 9 foot chess boards. As long as the pieces are well proportioned, this is not a problem.  Going under 12 inches is a problem, because the pieces become less detailed and it is harder for me to just glance and understand the board. So for board size, I feel it is always better to be a little too big rather than a little too small. 

Size does matter...for all purposes

Its correct that size doesn't matter but

but

but

its matter that a person is comfortable with that stuffs or not.

I've never heard that. It sort of makes sense that you might want to see the whole board without moving your head or your eyes, although I doubt if my eyes could focus on the whole board at once anyway.

The standard board size is squares of 2 to 2.5 inches:

https://www.chess.com/article/view/chess-board-dimensions

In my opinion this is true with the wording, clearer. This has to do with how we see and what registers. Take a typical sheet of typing paper and hold it horizontally so you can just see all four corners. The corners and especially the two sides will be fuzzy and perhaps ghosting. Extend your arms at full length and while not clear, clearer. Then tape the paper 8 feet away, and it will become clearer yet in its entirety. The two boards side by side, the smaller will appear as paper far away. The large will appear as paper nearer. 

Yes, if It is too small, it may hurt your eyes or make you uninterested in chess.

I bought a vinyl board a year ago that has 2.5 inch squares.  I prefer that over the 2.25 squares because the pieces aren't so close together.  I think 2.25 is the average tournament square. 

She was lying.

The 20 inch measurement, does that include the boarder or is that only the 8 squares? Because 20 ÷ 8 is 2.5 so I'm thinking that includes some border like 1 inch which leaves 2.25 inches per square. 

I don’t know how anyone could respond to your question. Have you actually sat down and thought about what you are asking or are you just posting random poorly thought out questions as they come to your mind?

Of course some people will find one size better, others will find another size better. Some will prefer a roll out plastic board with green and white squares while others will prefer an expensive wooden board. Some people will not mind playing using cheap plastic pieces without weights inside. Others will want them to be heavier. Yet others will say they always play better when they play with nicer wooden chessmen. 

Similarly, some people will be able to think easier while looking at a computer screen where the board is clearly visible and the pieces are the standard chess fonts that depict outlines of a piece, while others will think easier over a physical board with three dimensional chessmen. If they have gotten used to one or the other first, they may have difficulty adjusting to the other.

You could also look up the board and chessmen regulation sizes that are usually followed at chess tournaments. 

I've made chessboards and I always make them out of 2x2 lumber, which is actually 1-3/4" wide. So the playing surface is actually 8 x 1-3/4 = 14" x 14". I add a border, so the overall board is 17-1/2" square. Seems like just the right size to me....big enough to allow for good sized pieces. 

in offline games not so much but mainly more in 4 player chess and especially in nuke chess 

there are the standard sizes that is considered in tournaments 17 to 20 inch chessboard is normal but still it depends on your own preference just buy the size you are most comfortable afterall you are the only one to use it lol