Photoshop cut out image

​@Stefanie Langwerden 

Why do you need to remove the white background?

Are you layering/compositing this image over another? Have you looked at multiply or darken blend modes for layering?

Another method:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/photoshop-needs-quot-color-to-alpha-quot-button/m-p/14315420#U15230303

Printing doesn’t require transparency, in fact transparency is flattened at some point before or during printing.

Up-sizing is getting crazy good nowadays.  If you have to work with a raster image, then the larger it is the better.  Your screen shot is 480 pixels square.  The version below is 1920 pixels square with no jaggies (done with Topaz Gigapixel).  I tried a six times upscale which was still fully sharp, but I was seeing a tiny bit of rounding the outside of the pine tree triangles.

You can see that Remove Background has completely erased every white pixel with no ghosting from the AA.   

​@Stefanie Langwerden 

In addition, does it look any less pixelated when you change the Zoom from 677% to 100%?

Jane

I agree that if possible, it would be better if the client could provide the original vector artwork used to export that pixel image, because then you wouldn't have to mask it at all, and could scale it as needed.

But if the image you attached is all you have to work with, then OK. Unfortunately, the 36-year-old Magic Wand tool might be the most primitive and least useful selection tool because it makes a hard selection based on nothing more than a level threshold.

Selecting using channels is a traditional best practice, but it can be tedious. if Remove Background is not precise enough, you can use other techniques such as the Blend If options in Layer Style, or the tools in the command Select > Select and Mask as shown below.

Because the background is solid white, you could use the Blend If options to simply drop out the white. If the transition is too harsh, you can feather it by holding down the Alt or Option key as you drag one side of a slider to split it, as shown below.

If you use the command Select > Select Mask, you can click Select Subject to mask out the background, and you can clean up the edges using options such as Shift Edge (shown below), or you can adjust specific parts of edges using the Refine Edge Brush tool (not shown).

It might still look a little rough at 1200%, but this is how that masked result looks at 100% against my solid color background:

Just an observation, and probably not very helpful but, given the appearance of that artwork, I find it very hard to believe it was originated as a bitmap… more likely whoever designed it for your client provided them a low-res PNG/JPEG proof of a vector file.

​@Stefanie Langwerden 

I think you are using the wrong word for what you are trying to do. Cropping is done with the Crop tool, not the Magic Wand.

https://helpx.adobe.com/photoshop/desktop/crop-resize-transform/crop-straighten/crop-photos.html

Jane