At first, it was stoo big for me, but it was very helpful when I worked at home.

My workoperating system doesn't support dual monitors, so I couldn't see all work items usingof my windows on a 27 -inch monitor.

This year, I had athe chance to get a 43 -inch monitor, which was a test product.

The size of theis monitor is almost double the size of a 27 -inch one.

Moreover, ithe monitor supports UHD videos, so it is the best choice when Ifor watching videos throughon Netflix, YouTube and so on.

I totally recommend whenit if you work at home.

Unlikely other people, I use a 43 inch monitor in my office.

Last year, I tried to use a 32 inch monitor, which wasI got for my birthday present.

At first, it was stoo big for me, but it was very helpful when I worked atfrom home.

Just a stylistic correction :) The sentence is fine the way you wrote it.

My working system doesn't support dual monitors, soand I couldn't see all my work items using a 27 inch monitor.

This year, I had a chance to get a 43 inch monitor which was a test producttry out a test product, a 43 inch monitor.

"Try out" instead of "get" here, adds clarity to the idea that this is the first time you are using a 43 inch monitor.

The size of the monitor is almost double of a 27 inch one.

This sentence is fine! But if you wanted to, you could delete "The size of the monitor," and just use the pronoun "it," because you have already established that the topic of your paragraph is the monitor.

Moreover, the monitor supports UHD videos, so it is the best choice when I watch videos throughon Netflix, YouTube and so on, etc.

"Etc."/"and so on" have the same meaning, so just a stylistic choice! :)

I totally recommend using a larger monitor when you work atfrom home.