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Borders > Recommended image sizes
Borders is a responsive theme, meaning that it always tries to serve the best image for the best screen, so you don't have to worry about proper image sizing and performance.
However, what you need to consider is that the theme works with aspect ratios, meaning that images will crop based on the aspect ratio you set up in each section (most sections have options to set certain aspect ratios for the images in order to ensure that you have a few layout options that will give you the most of your images).
If you are looking for a guide on how to size your images, you can take this as an example:
| Aspect ratio | Image resolution (minimal) | Image resolution (optimal) | Image resolution (maximum) |
| Ultra-wide (21:9) | 1280 x 548px | 2100 x 900px | 3820 x 1637px |
| Wide (2:1) | 1280 x 640px | 2100 x 1050px | 3820 x 1910px |
| Landscape (16:9) | 1280 x 719px | 2100 x 1180px | 3820 x 2146px |
| Standard (3:4) | 1280 x 853px | 2100 x 1400px | 3820 x 2546px |
| Short (4:3) | 1280 x 960px | 2100 x 1575px | 3820 x 2865px |
| Square (1:1) | 1280 x 1280px | 2100 x 2100px | 3820 x 3820px |
| Tall (5:6) | 1280 x 1536px | 2100 x 2520px | 3820 x 4584px |
| Taller (2:3) | 1280 x 1920px | 2100 x 3150px | 3820 x 5730px |
If you have large images you can upload them without fear, the theme will choose proper resolutions for each screen. Please remember that Shopify has an internal image compression engine that will compress your images to a certain degree, which can be bypassed if you are using PNG files. At the same time, compression will result in a really performant store, so it's best to just upload the best (JPG) images that you have and let Shopify & the theme do the rest.