How change dimensions of Thumbnail | Indonesia Template

[my add]

Hi guys, how i change the dimensions (width and heigth) of the thumbnail of my post????
I have the indonesia Template : https://gooyaabitemplates.com/indonesia-blogger-template/
And my blog is: http://torotutoriales.blogspot.com/ (IS IN SPANISH)

[Templatesyard]

But you mentioned blog that has G vision Template. Please mention template which is help needed.

[my add]

Now i have the GVision template, but the other i need the help… i change now.

[my add]

I don’t need more help, thanks c:

[my add]

If you know, say me, but i need change the template sorry :c

[Templatesyard]

GVision is also popular design. Your blog has nice look with GVision. Good luck buddy. :-)

[my add]

Thanks c:

[Author]

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