@mozinho Firstly, the source image is large enough and of high-enough quality to make a 250*250px cutout, which has been the megapack standard for a few years now.

Secondly, your cutout doesn't have many hair details - you'd get a better cutout by using remove.bg to cut your images as shown in this post: https://sortitoutsi.net/comments/get/638590

Additionally, all cutouts must include some of the collar. You can easily move the collar upwards in cases where the person has a long neck using this technique: