That's too small.

Can I make another, how many pixels takes height and width ?

The guidelines are in the first post of this thread: https://sortitoutsi.net/content/360/guide-to-cutting-and-assorted-hints-tips-and-assistance

If you have any questions just ask 👍

@Ibarra, that cut is not of the best possible quality. It's in the wrong dimensions, has no collar, is cropped in an inconsistent manner and isn't very sharp.

I recommend using remove.bg for your cuts. It's a fantastic free online tool which does the heavy lifting for you by removing the background in the source image, leaving you to only rotate, crop and/or nudge the collar upwards. It's tremendously easy to use and provides fantastic quality. With it, you can go from source to cut in a couple of minutes for the vast majority of images. If you watch this video, it should address all your queries 🙂

Here's a couple of videos on how to use it, one when combined with Photoshop and another using photopea.com, which is a free online app so close to Photoshop that it has the same shortcuts, layout and icons 😉 If you don't have Photoshop, photopea.com is the tool I would recommend to use to tweak the draft cut produced by remove.bg. It's more powerful and versatile than GIMP and other similar tools.