One of the most difficult parts about owning a new iPhone 6S or iPhone 6S Plus is picking out an equally-new wallpaper.

It has to be crisp, beautiful, breath-taking, inspiring, bold, colourful, rich, and preferably all of the above. Thankfully, between Reddit, Flickr, Imgur, as well as other resources, the internet is chock-full of free-to-download wallpapers.

We've scoured the web looking for some of the best wallpapers and made sure to only select ones with 750x1334, 1080x1920, or 1242x2208 resolution. So, without further adieu, browse the gallery below to see what we found.

There's trippy geometric shapes, delicious patterns, silhouetted celebrity portraits, brilliant starry-night shots, etc. We've even included flat wallpapers for the minimalists out there. Everyone should be able to find something.

To download a wallpaper, right-click on the image, and then save it to your computer. If you're using an iPhone and would like to download a wallpaper, press on the image until a menu pops up. From there, select Save Image.

These wallpapers will perfectly fit either 4.7-inch or 5.5-inch screen sizes. Please let us know in the comments below if you've seen other gorgeous wallpapers worth including.