Good job @acapsule.

One small thing to keep in mind for the future, though. There should only be 2-3 pixels between the bottom of the chin/facial hair and the bottom of the cut. In cases like this source when doing so would mean there is no collar, follow the steps outlined in the collar spoiler in this post to get the collar a bit closer to the chin

I'm not really sure how that works...I use GIMP? Do you just want me to remove part of the neck and move the collar up?

That tutorial is really intended for Photoshop, and I've never used GIMP, but I would think it should be possible to select the collar and move it upwards along the lines of the video and images in the post I linked to. This should be done before resizing the cut to 250x250 (or 180x180 as the case may be) because doing it now would mean a reduction in quality

Don't worry about this cut, but may be worth experimenting on similar sources in the future to achieve the intended effect